Sealing of sewer pipes. Sealing joints of PVC sewer pipes, cast iron and plastic pipes without dismantling

A sewer system that does not leak is considered reliable. Therefore good sealing sewer pipes at home or in an apartment is a guarantee of no troubles in the future.

The age of the sewerage system, its wear and tear (for example, cast iron pipes in the risers of high-rise buildings), outdated materials, of course, can leak due to age and require complete replacement. However, as practice shows, during operation the most vulnerable point, whether when laying new or when repairing old communications and drainage systems, is the place where they are connected. And the question remains of how to seal sewer pipes at the joints.

Previously for sealing cast iron pipes in risers and basements of houses and apartments they used linen winding or plaster bandage and oil paint. But today in construction stores sells a ton modern materials, sealants, to select which it is necessary to understand their differences, purposes and properties, applicable to drainage systems.

For your information! Easy-to-use modern materials allow you to do all the work yourself, including waterproofing and sealing.

Self-adhesive tape is a modern material for sealing joints in the sewer system. It is a film wound on a spool white, has different widths.

Advantages of self-adhesive tape:

• Convenience and ease of use;
• Good resistance to corrosion, thereby protecting the sewage system from rusting;
• Does not conduct electricity;
• High reliability and efficiency.

Disadvantages of self-adhesive tape:

• Lack of UV resistance. This makes it impossible to use this material in open spaces.

Advice! To create an airtight connection using tape outdoors, cover the joints of the sewer pipes with sun protection material at the gluing site.

Experienced craftsmen and builders use self-adhesive tape not only for sealing joints of sewer systems. It is often used when working with fittings and various shaped elements.

Features of working with tape

In order to perform the work efficiently, it is necessary to first prepare the pipes. They are thoroughly cleaned from layers of dust, dirt, etc., and dried well. Cover with a layer of primer and dry again. Once the surfaces have been prepared, you can apply the tape.

The tape is wound around the desired area in a spiral with a half overlap for greater tightness. After this, you can wind the second layer in a similar way. The pipes are sealed!

Note! Care must be taken to ensure that no folds are formed during the winding process. Even small ones can reduce the tightness of the winding to zero.

Silicone pipe sealants

Self-adhesive tape is well suited for processing pipe joints, but this material is not always applicable in construction. There are other materials and substances that can ensure the tightness of the sewer system.

Silicone sealants are substances that harden upon contact with air and have excellent sealing properties. Apply directly to the area requiring treatment.

Sealants can be made from a combination of different starting materials. One of the most popular is silicone (or siloxane), consisting of silicone rubber and additives that increase the strength and adhesion of the material. To accelerate the polymerization of the substance, various vulcanizing impurities are used. The result is a rubber-like elastic material with excellent sealing properties and a wide range of applications.

Advantages of silicone sealant

• High degree of adhesion between different types of materials;
• Good resistance to various temperature conditions;
• Sufficiently high mechanical strength;
• Good moisture resistance;
• Long service life.

Depending on what hardener is used in the material, silicone sealants for plastic pipes are divided into two types: acidic and neutral. Acidic sealants have limitations in application and their cost is slightly lower than neutral ones.

Sealants belonging to the neutral class are suitable for any surface and provide excellent performance in bonding various surfaces (for example, joints of metal and plastic sewer pipes).

Silicone sealants are enclosed in devices called caulking guns. With absence of this device, or the impossibility of using it, you can use the handle of a hammer, acting like a piston, to press on the bottom of the tube. Thus, dosing the extrusion required quantity material from the packaging, carry out the necessary work.

How to seal sewer pipes?

Sealing of sewerage systems in conditions modern construction carried out by other types of materials. Craftsmen often use epoxy resin, asphalt mastic, resin strands, hemp ropes and technical sulfur.

Most often used when working at home epoxy resin. To harden this material, polyethylene polyamine is used for cold hardening, and maleic anhydride is used for hot hardening. But others can also be used. The combination proportion can vary and on average varies from 10:1 to 5:1.

Technical sulfur is used to seal sewer outlets. To do this, it is crushed, heated to a suitable plastic state and poured directly onto inner surface exhaust pipe joints. This compound is made from Portland cement, in this case you need to prepare a solution.

Tarred hemp rope is excellent for working with ceramics and cast iron. And the filling of petroleum bitumen and asphalt mastic well seals the joints of ceramic pipes.

Sealing cast iron sewer pipes

To connect cast iron riser pipes, another is inserted into the socket of one pipe, and the joint is sealed with the selected material. Experienced craftsmen Everything is usually carried out using the following technology:

• Linen tow is inserted into the gap between the riser pipes without impregnation to a depth of approximately 2/3 and caulked (compacted).

For your information! Flax tow can be replaced with hemp treated with resin.

• On top of the tow, in the free space of the joint, a mixture of water and Portland cement is placed in a combination of 1:9, respectively.

For your information! To create a mixture, if necessary, you can use cement in combination with asbestos fiber, in a 2:1 combination, respectively. And before pouring it into the pipe, add a little water to the mixture.

All of the above materials can be replaced with silicone sealant, which is simply poured into the free space between the riser pipes. And to protect this type of sealant from drying out too quickly, the application area is covered with polyethylene or a damp cloth.

Sealing the joint between cast iron and plastic sewer pipes

When repairing an old sewer system in a house or apartment, a situation often arises when it is necessary to join new plastic pipes with old cast iron ones. And the question arises, what and how to seal the sewer pipe correctly.

To do this you need:

• For connecting pipes from different materials you need to purchase special adapters;
• The surface of the cast iron pipe is thoroughly cleaned and degreased;
• Internal and outside surface coated with sealant;
• An adapter is installed in the socket;
• Wait time for the sealant to harden;
• Connection in progress plastic pipe and joint sealing;
• A leak test is carried out.

If you adhere to technology and choose high-quality material to create a strong and tight connection to the sewerage system, this will be a good foundation for the future, protecting you from troubles associated with sewerage leaks. In our video you can see how to seal and waterproof sewer pipes with your own hands.

The tightness of the sewer system is one of the main conditions normal operation this type of communication. The possibility of leakage must be completely eliminated so as not to pose a threat to nearby networks, structures and the environment.

Sealant for sewer pipes will prevent leaks - the product is used for both internal and external work. How does it work and which one is better to choose? Agree, it's worth finding out.

So that you can find and purchase a suitable sealant, we will identify the popular options and describe their specific use.

The article discusses in detail the technologies for using sealing materials. There is a rating of manufacturers of the best products produced for this area of ​​construction. Photo applications and video reviews will help you get comfortable with the topic.

The sewerage system is reliably sealed during the installation stage. During operation internal system regularly inspected to detect and eliminate leaks in time.

Wastewater should not flow out, and nothing should get into the sewer system from the outside, because... this can disrupt its operation and lead to serious damage.

Particular attention should be paid to sealing pipes as they are much more difficult to repair if leaks occur. If the operation of the system is disrupted due to contact with groundwater, you will have to make a lot of effort to determine this.

Repairing the underground part of the sewer system is almost as labor-intensive and expensive as installing a new section of pipeline. It involves a large volume of excavation work, replacement of damaged system elements

Careful sealing during the construction phase of the sewer system prevents a number of problems:

1. Leaks to the outside. Once in the soil, wastewater can pollute water drinking wells, cause serious illness. Unpleasant indoors is also dangerous, because... rotting organic matter emit gases harmful to humans: hydrogen sulfide, ammonia, methane.
2. Flooding of buildings and structures. In case of severe leaks, soil erosion may occur. Sewage water floods foundations, cellars, cellars, and basement floors. Due to the high chemical content active substances they accelerate the destruction of building materials and provoke corrosion.
3. Leaks into the system. If atmospheric or groundwater enters the system, the pressure in the pipeline increases. Due to the strong pressure of wastewater, the operation of pipes is disrupted, and treatment or storage facilities may not be able to cope with the additional load and fail.
4. Leaks at joints due to temperature changes. If the system is initially installed efficiently, the joints are reliable and do not leak even without additional sealing. However, processing is still necessary, because Temperature changes over time lead to a decrease in tightness.

They are used for installation of sewerage systems. A suitable sealant should be selected for each pipe material. The choice also depends on the installation technology and the intended purpose of each individual element of the system.

Main types of sealing materials

Many different materials are used to seal sewer pipe connections:

• sealing tapes;
• polymer sealants;
• technical sulfur;
• jute and hemp ropes;
• epoxy resin;
• Portland cement;
• mastics based on petroleum products;
• rubber cuffs.

Each sealing material has its own varieties, features, purpose and scope of application.

Option #1: Sealing tapes

There are regular and foil self-adhesive tapes. They are designed for sealing connections of water and sewer pipes and have unique properties. The tapes contain bitumen-polymer materials, making them absolutely waterproof.

Option #3: technical sulfur

Technical sulfur is produced by processing petroleum products. It can be powdery or lumpy and is sold in hardware stores. This a good option for sealing joints of cast iron pipes. An additional plus is the low price.

Sulfur is a hard and brittle sealant. To make it more elastic, do not overheat the material. You can also add ground kaolin to the sealing composition (in a ratio of 1:10)

The sulfur is crushed (if lumpy sulfur is purchased), heated to the melting temperature (about 130-150˚C), and then poured into the bell space.

When the material hardens, it will turn into a dense, waterproof mass. Its only drawback is low elasticity.

Option #4: Portland cement

Portland cement is indispensable for many types of work. The material contains clinker, gypsum, and calcium silicates. The dry mixture is diluted with water until a thick solution is obtained. It hardens quickly, forming a high-strength, frost-resistant and water-repellent monolith.

Portland cement begins to harden within 5-10 minutes, so the solution should be prepared immediately before use, and work should be carried out as quickly as possible

Special additives are added to the cement mixture to increase its elasticity - this allows you to reliably seal pipeline joints. The material is resistant to temperatures, tolerates freezing and unfreezing well, so it is successfully used in outdoor installations.

Option #5: epoxy resin

Epoxy resin is a universal adhesive that can also help out when installing sewer systems. To prepare a sealing compound, epoxy resin is mixed with a hardener. The proportions depend on the brand of material and are indicated in the instructions for use.

Be careful when preparing the sealing compound. If there is too much hardener, ready mix may become hot or even boil

When mixing resin and hardener, it is important to strictly follow the manufacturer's recommendations, otherwise the hardening time of the composition and the performance properties of the finished coating may change.

Option #6: bitumen mastics

The sockets of ceramic pipes are often filled with bituminous materials. Bitumen-rubber and bitumen-polymer mastics have proven themselves to be excellent. Based on the type of application, they are divided into cold and hot.

Cold and hot mastics are an inexpensive sealing material, freely sold in construction supermarkets. They are elastic, durable, resistant to chemicals

To seal pipes, it is better to use cold-applied compounds, because... they are much easier to use, and the work itself is safer. The only disadvantage of such sealants for sewer pipes is that they are somewhat more expensive.

Option #7: jute and hemp ropes

To seal the joints of cast iron and ceramic sewer pipes, hemp and jute ropes and resin strands are traditionally used. These are cheap and easy-to-use materials, but in terms of their technical and operational properties they are significantly inferior to modern sealants.

Jute ropes look more attractive than hemp ropes, but the materials differ little in their performance properties. It is better to give preference to hemp, because... it's cheaper

For sewer pipes, it is better to use sanitary silicone or polyurethane sealants. Their quality and durability can vary greatly depending on the manufacturer, so pay attention to brands and choose the most reliable ones.

Option #8: sealing cuffs

Durable cuffs made of thick technical rubber are used to protect the joints between the casing and the working pipe. They are applicable for pipelines of various types - technological, sewer, drainage. The diameter of the products is from 2.5 cm to 2 m.

Exist different kinds cuff The most common are TM, that is, heat-shrinkable, coated on the inside with an adhesive layer. To make the transition airtight, the rubber is heated. It shrinks and tightly grips the pipes, while simultaneously sticking to them.

8 best sealant manufacturers

Brand Sealants Ceresit And Moment out of competition. They are reliable, durable, highly elastic and adhere to any surface. If you have the opportunity to purchase formulations from these brands, do not hesitate, because... you will pay not just “for the name”, but for real quality.

There are 6 more brands that produce decent products:

• Ciki Fix. This brand produces high-quality transparent sealants that are perfect for metal and ceramic pipes. The finished coating is resistant to impact detergents, solvents.
• Belinka. These are popular one-component compositions for sealing seams and joints. They are resistant to negative impacts, durable and elastic.
• Tytan. The Tytan brand produces high-quality sanitary sealants based on silicone. If you need a high-strength seam, you should give preference to the Tytan Professional polyurethane composition.
• Krass. The Krass brand produces fast-curing, one-component sealants, which, after hardening, form tight joints that do not shrink.
• S 400. Distinctive feature sealants of this brand – increased biological stability. Includes a large number of fungicides that prevent the appearance of fungus and mold on seams.
• Dow Corning. The sealants of this brand hold surfaces together so firmly that they are used as glue. They are thicker than compounds of other brands and penetrate deeply into seams and joints.

Sometimes sealants are subject to increased requirements for certain performance characteristics. In such cases, it makes sense to carefully study the manufacturers' descriptions and consult with sellers.

When purchasing, pay attention to the presence of antifungal additives in the sealant. Microorganisms grow particularly well at the joints of sewer pipes, and a high concentration of fungicides is needed to prevent this

For example, best sealant for rooms with increased fire hazard - universal composition Krass; for complex connections – "Moment Germent"; for ceramic pipes – Belinka Belsil Sanitary Acetate; and for rooms with constant high humidity - Ceresit CS 25 or S 400.

Conclusions and useful video on the topic

During the process of sealing a sewer system, many questions arise. We offer video materials that will help you cope with difficulties and complete all the work yourself.

Instructions for sealing sewer pipes using silicone sealant:

Whatever type of sealant for sewer pipes you choose, you need to carefully prepare the surfaces and perform the work efficiently. There should be no cracks or fistulas on the pipes. Before sealing, they are cleaned, repaired, and degreased.

When working, you should strictly adhere to the technology, and after finishing it, wait the allotted time until the composition hardens. Only after this the system can be operated normally.

Do you have experience sealing sewer pipes? Please share information with our readers and suggest your method of solving the issue. You can leave comments in the form below.

To prevent leaks in sewer systems, careful sealing of the joints of pipeline elements is provided at the construction stage. To carry this out, you must use one of the sealants specifically designed for sewer pipes. It is selected depending on the materials used, the installation method and the preferences of the installer performing the work on installing the sewer system. In this article you can find out which sealant for sewer pipes is best to use and how to properly carry out this sealing.

The Importance of Sealing Sewer Systems

All pipes need to be sealed, especially those laid underground. This process should be taken seriously in order to do everything at once and for a long time. After all, if defects exterior finishing can be easily corrected, then to re-seal the expansion joints of pipes buried in the ground, a considerable amount of work will be required, almost the same as when installing the system anew.

At the same time, it is important to prevent leakage both from inside the sewer pipes and inside the pipeline (for example, groundwater), so that the operation of the wastewater discharge system as a whole is not disrupted. For different types sewer systems use certain types of sealant.

Types of sealants and their application

The most common sealing materials that provide quality work The components of the sewer system include tapes, silicone materials, technical sulfur, Portland cement solution, epoxy resin, resin strand, asphalt bitumen, etc. When using each of them, it is necessary to follow a certain technology in order to achieve the required quality.

Option #1 - self-adhesive tapes

Among modern materials for sealing, special tapes with anti-corrosion properties are widely used. They are used to seal the area where pipes of different types are connected, to protect taps, plugs, bends, turning corners and other elements of the sewer system.

Sealant tapes are quite simple to use, but very reliable and effective for protecting pipe joints

The composition of such a tape includes a copper or aluminum layer, its base is bitumen-rubber. The protective film is removed during installation. Self-adhesive sealant tape is easy to use but very effective, strong and durable. It not only seals, but also provides comprehensive pipe protection, including anti-corrosion and dielectric protection.

Sealing of sewer pipes using tape is carried out in the following order:

• Before applying the tape, the surface is cleaned of dust and dried;
• to avoid wrinkles and folds, the tape is kept taut when winding;
• The tape is applied in a spiral with a 50% overlap, so the entire insulated surface will be covered with 2 layers of film.

It is important to know! Sealing tapes do not tolerate direct impact ultraviolet radiation, therefore sealed sections of sewer pipes located in the open sun must be wrapped with additional protective material.

Option #2 - silicone sealing materials

The basis of such sealants is silicone rubber. The composition of silicone sealants is a complex mixture of various substances that provide reliable sealing quality. They are characterized by a high degree of adhesion to surfaces, without pre-treatment with primers.

A distinctive feature of silicone sealants is a high degree of adhesion to surfaces that do not require additional processing

Depending on the type of hardener, silicone sealant can be of two types:

1. Acid. It has a relatively low cost, but is not suitable for application to surfaces that can interact with acids.
2. Neutral. This sealant is considered more universal and is suitable for any surface.

Silicone sealants are used to seal joints between metal and plastic pipes. With the participation of moisture in the air, vulcanization of the silicone sealant occurs. Silicone paste turns into a rubber-like substance after vulcanization.

Other materials for sealing

In addition to the most common materials listed above, there are other means of sealing sewer pipes, such as:

1. Portland cement. This material is part of asbestos-cement and cement mixtures, which are used when installing elements of a cast iron sewer system (chasing races pipe connections).
2. Petroleum bitumen, asphalt mastic - are used to prepare fillers, which are used to seal the joints of ceramic pipelines.
3. Epoxy resin is a common means of sealing sewer pipe joints at home.
4. Technical sulfur. It is mainly used for sealing joints of cast iron sewer pipes. The sulfur is first crushed, then heated until melting and poured into the joint hole.

Resin strand, jute, hemp rope. Their area of ​​application is sealing the sockets of cast iron and ceramic sewer pipes. The most effective is the combination of rope with resin impregnation.

To seal sewer pipeline joints, especially when caulking socket joints of cast iron pipes, mixtures containing Portland cement are often used.

One cannot discount yet another one of the oldest and simple ways sealing - sealing joint cracks with paint. And although this method is used less and less, it gives good results on all types of sewer pipes. The socket is stuffed with cloth, then paint is poured into it. The contents of the socket are compacted using a screwdriver or wire and left to harden. For this purpose, acrylic, epoxy and polyurethane paint are recommended for use, since these types of paints are characterized by high water resistance.

We invite you to watch a video with an example of sealing an external cast-iron sewer pipe using a cable (resin strand):

The choice of method and material for sealing sewer pipes does not have of great importance, since all the means described above provide high degree tightness. Of course, the decision to use one or another sealant for sewer pipes will depend on the location of the sewer system and the material of the sewer. But the determining factor in the sealing process is its proper implementation, which will guarantee the absence of leaks in the sewer system for many years.

July 25, 2016
Specialization: philological education. Work experience as a builder - 20 years. Of these, for the last 15 years he led a team as a foreman. I know everything about construction - from design and zero cycle to interior design. Hobbies: Vocals, psychology, quail breeding.

Greetings, my dear readers!

Many people know that when creating and repairing various utilities, it is important to reliably seal all elements. The reliability and efficiency of systems depends on this. Today I will tell you how to choose a sealant for water supply, sewerage, heating and smoke exhaust pipes.

Category No. 1: materials for sealing water and sewer pipes

For sewer and water pipes There are several types of seals.

Sealing tapes

Self-adhesive tapes, specially created for sealing pipe joints, are a modern means of sealing. They have such advantages.

1. Self-adhesive films are easy to use and highly effective.
2. Sealing tapes on a durable polyethylene base have good performance characteristics.
3. They are universal, they can be used to seal different types of pipelines (sewage and water supply), because they have anti-corrosion and dielectric qualities.
4. Tapes can be used not only for sealing pipe joints, but also for sealing system elements: inserts, plugs, rotary corners, etc.

1. Prepare its surface for winding the sealant: it must be cleaned of dirt, dust and dried.
2. When applying the tape to the pipe, make sure that it is constantly tensioned; in addition, do not allow wrinkles and folds to form.
3. Wind the film, creating a 50 percent overlap in a spiral. As a result, the entire sealed surface should be under two-layer tape protection.

Plumbing tape has poor UV resistance. As a result, if the sealed section of the pipeline is exposed to the sun, it should be additionally protected from ultraviolet radiation over the film.

Silicone compounds

Silicone-based plumbing pipe sealant is another common sealant. Rubber silicone compounds are a composite of different substances that provide high quality sealing. They have good adhesion to compacted surfaces and do not require pre-treatment with a primer.

I would like to warn you that, based on the type of hardener, silicone sealants for sewer pipes are divided into the following types:

1. Acidic compounds. Their price is relatively low. However, they should not be used to seal certain surfaces that may react with acids.
2. Neutral analogues. They are universal and can be used for all types of materials from which pipes are made.

Silicone sealants are used to seal both metal and plastic pipes, but only sewer pipes.

Following the vulcanization of silicone gel, after its application, it is transformed into a material similar in its qualities to rubber. On this process has a direct impact on the moisture contained in the air.

On this moment are of the highest quality, which is why sealants of the Tytan, Moment and Sinicon brands are popular. They are used not only for sealing joints between metal and plastic pipes, but also for repairing fistulas and cracks.

I'll tell you how to use them:

1. Before sealing the surface, make sure it is dry and clean.
2. Next, carefully spread silicone gel over the interface of pipes or system elements.
3. The composition should not be smeared further. Apply it in 2-3 layers, slightly going beyond the boundaries of both sides of the joint.
4. It is extremely undesirable to moisten the pipe not only before and during work, but also until the polymerization of the silicone is completed.

It is extremely easy to squeeze out and distribute the sealant - using a special mounting gun. If you don't have one, you can use a regular hammer.
Insert its handle into the tube and press this kind of piston.

Epoxy resin

It serves, like adhesives based on it, as the most used product for water and sewer pipes:

1. In water supply and wastewater systems, epoxy resin is used for cast iron and ceramic pipelines, which require a more durable interface than plastic counterparts.
2. The advantages of this sealant include its long service life and resistance to more than fifty chemically aggressive compounds.
3. “Epoxy” is not resistant only to sulfuric and nitric acids, hydrogen peroxide, methyl ethyl ketone, acetone and fluoride compounds.

Hemp, jute rope

Another common sealant for water pipes made of metal and sewer analogues made of ceramics and cast iron is jute or hemp rope, as well as resin strand (heel). They are used to seal the sockets of networks. I would like to give you some advice - using resin-impregnated rope is a more preferable option.

Previously, only jute impregnated with resin was used to seal household communications. The principle of its operation is the same as that of self-adhesive tapes, but they are fixed differently.

Jute is an ordinary twine. However, if it is impregnated with bitumen or resin, it becomes a durable and strong seal for the sockets of ceramic and cast iron sewers.

Other means

1. Cement is a common element in some sealants. Most often used for the production of asbestos-cement mixtures and for caulking cast iron sewer pipes.
2. Asphalt mastic and an analogue from petroleum bitumen are used for the production of casting compounds. They are needed to seal the joints and sockets of ceramic networks. The following mastics are used for different types of pipelines: talc-bitumen, asbestos-polymer-bitumen, rubber-bitumen, polymer-bitumen, etc.

1. Technical sulfur is used to seal the sockets of cast iron sewer pipes. Before use, it must be crushed and then heated until melted. It should be said that this method is now rarely used, because sulfur has a very pungent and unpleasant odor.

Category No. 2: seals for heating systems

We all have to install a new heating network, change radiators and thread seals shortly before heating season. Find out from my article which sealants can now be used for this.

Flax tow

At the moment there are many seals for radiators and pipes heating systems, which belong to different generations. One of the oldest sealants is flax tow, planted on paint.

However, this material was good many years ago; now it is of little use. I'll explain why:

1. Linen is natural, i.e. degradable, therefore a short-lived sealant. Earlier cast iron radiators quietly operated for 40 years. However, now the service conditions of heating networks have become different. This sealant will have to be changed after 3-4 years.
2. Current paints have a composition that is different from that of their Soviet counterparts. They are absolutely not suitable as impregnation of flax fibers. Silicone is also not suitable for this. It contains vinegar, which causes thread corrosion.

1. Modern high-rise buildings are not Khrushchev buildings with 2-5 floors. During pressure testing (testing of pipelines for strength and tightness) and operation of the network of such a building, a pressure of up to 16 atmospheres is turned on. Linen sealant can be used at pressures up to 8 atmospheres.

As a result, the connections on the flax seal burst due to its swelling or cannot withstand the operating pressure in the heating system.

For apartments in 1-5 storey buildings apartment building Linen sealant can be used. There are only a few connections in the dwellings.
IN own home, in a cottage, the number of threaded connections on pipes can approach several hundred. It is highly undesirable to use flax sealant in them.

More modern means - polymer threads and anaerobic sealants

The photo shows the sealing of a pipe fitting with a polymer thread.

Flax planted on paint is gradually becoming a thing of the past. Now there is a more modern, reliable, safe and durable method of sealing pipes and elements of heating systems. It is based on the use of polymer threads and anaerobic gels.

1. The anaerobic sealant for heating polymerizes in contact with the metal, completely filling the entire thread. The connection will last as long as the pipes, without replacements or leaks. He won't be afraid high blood pressure and temperature, shock and vibration loads.
2. Polymer threads are also an excellent sealant for threaded units of heating systems. They are suitable for sealing metal, PVC and polypropylene pipes, the mating of which is undesirable using gel materials. The operating temperature of the threads is not limited, and dismantling is easy.

In the lower table I present to you specifications high-quality anaerobic gels from Russian company RST (Region Spetstechno).

Name	Purpose	Characteristics
Gel "Santech-master" (green)	Anaerobic sealant for metal flanges and threaded connections up to 1.5 inches.	Polymerization period: 20/30 min. Application temperature from +15º. Dismantling is easy. Volume: tube – 60 g, blister – 15 g. Operating temperature range -60/+150º. Ingredients: dimethacrylate polyglycol and modifiers.
Gel "Santech-master" (blue)	Anaerobic sealant for metal threaded and flanged connections up to 2 inches	Polymerization period: 15/20 min. Installation temperature from +15º. Dismantling requires medium force. Volume: tube - 60 g, blister - 15 g. Composition:
Gel "Stop-master" (red)	Anaerobic sealant for metal flange and thread connections up to 3 inches.	The polymerization period is 5 minutes. Installation temperature +5º. Heating is required for dismantling. Volume: tube - 60 g, blister - 15 g. Composition: dimethacrylate polyglycol and modifiers. Operating temperature range -60/+150º.

Category No. 3: sealants for furnace equipment

Furnace equipment may crack due to temperature changes.

What are furnace sealants used for?

1. Through cracks can reach the chimney. Then soot on its walls and increased fuel consumption will not be all the problems. Harmful combustion products will begin to penetrate into living rooms.
   Problems with a chimney are not so common when it is made of high-quality ceramics or a sandwich, but they are dangerous. For optimal traction, its channel must be sealed. This directly affects fire safety. Why?
2. Soot often settles on the chimney walls. If it is not cleaned in a timely manner, it may ignite when exposed to air oxygen. The ignition temperature will be quite high - up to +1500º. If the thermal insulation of a heated pipe is poor, the floors or roof will catch fire.
3. Incomplete sealing of the smoke exhaust duct also leads to fire gas burner goes out. This problem is widespread when using gas boilers.

To cover cracks, as well as to join channel elements, it is best to use a paste sealant for chimneys. The basis of such materials are different polymers that give different technical characteristics to the seal.

They are packaged in tubes of different configurations and volumes. There are packages that look like tubes of toothpaste. The sealant is simply squeezed out of them.

Tubes for mounting guns are also available. In this case, you need to cut off the spout on the cone of the lid, insert the sealant into the device and squeeze out the required volume of paste using the trigger lever.

Types of material

According to the form of release, high-temperature seals are divided into two- and one-component ones.

The first of them must be mixed before use. In most cases, they are used by professional builders.
This happens due to working conditions: when mixing components, you need to measure them very accurately. The permissible maximum error is only one gram.

In addition, if a small proportion of components accidentally gets into each other, a reaction begins, and the viability of the resulting mixture is only a few hours. Based on all this, for non-professional builders, I recommend using ready-to-use paste sealants.

Based on the area of ​​application and withstandable temperatures, oven sealants are divided into two groups.

1. Heat-resistant seals are used for areas that heat up to +350º. The scope of their use: external surfaces of fireplaces and stoves, masonry joints (however, not between the masonry and casting of the stove). They are also suitable for sealing joints between parts of hot water supply and heating systems, sandwich chimneys and bricks with roofing.

1. Heat-resistant and heat-resistant analogues are able to resist extremely high temperature- up to 1500º. The scope of their use in fireplaces and stoves, interface areas brickwork and furnace casting. In boilers they are used in furnaces and combustion chambers. In chimney ducts - at seams and joints, including those running immediately after the outlet pipe.

These pastes can be used in direct contact with open flame. However, then the sealant must have an additional characteristic on the packaging: “fireproof” or “fire resistant”.

Heat-resistant seals

This type of high temperature seals is made on a silicone base. The temperature regime that the composition can withstand may vary based on the exact composition of the paste. Thus, to increase thermal resistance, silicone is modified with iron oxide.

This paste holds temperatures well up to +250º, with a short increase to +315º. Iron oxide colors the sealant in a brownish-reddish tone.

Therefore, using a similar composition for brick oven or a fireplace, you won’t spoil their appearance, it won’t be visible. It can also be used to seal the joints of heating pipes. However, aesthetics will suffer here.

Based on its composition, silicone material can also be neutral or acidic. The latter analogues dry out and release vinegar. As a result, such sealants are prohibited from being used for cements, concretes and metals that are not resistant to corrosion.

In this case, a reaction occurs between the base and the seal, which leads to the appearance of a layer of oxides or salts, which destroy the seal. Then the seams and joints stop playing their role, beginning to let air and moisture through.

Cement, concrete and metal can be sealed with neutral silicone-based sealants, because... when cured, they release alcohol and water. The main properties of neutral heat-resistant sealants are below.

1. UV resistance. Thanks to this, they can be used outdoors, for example, to seal roof penetrations.
2. Moisture resistance. This parameter makes it possible to use this composition for chimney ducts. For example, seal seams and cracks in roof passages, at the junctions of its flooring, and seal threaded connections when installing heating.
3. Good adhesion to substrates made of different materials: concrete, brick, glass, metal, plastic, ceramics, wood.
4. After hardening, the seal retains some elasticity and therefore does not crack under mild vibration and deformation. However, plasticity also has its drawback - paint does not adhere to silicone sealant. It peels and cracks.
5. The drying period of the material can be several hours or several days. This parameter is affected by the composition of the sealant and its storage time. The fresher the sealant, the faster it dries. The drying period is indicated on the packaging.

Manufacturers measure this parameter at a humidity level of 50 percent and a temperature of 23º. Changing their values ​​shortens or lengthens the drying time. The lower the humidity and temperature, the longer it takes for the sealant to harden.

Polymerization of the sealant begins from its surface and continues inward; it requires air moisture. Based on this, do not make the seams deeper than necessary; the silicone at the bottom simply may not harden. In this case, the joint or seam will allow water or smoke to pass through.

To ensure that the compactor has good adhesion to the base, I strongly advise you to prepare it.

1. First, clean the surface down to the very base: remove dirt, dust, salts and oxides.
2. Next, wash it with water and thoroughly degrease.
3. Silicone-based sealants must not be used on wet surfaces. Therefore, wait until the base is completely dry before sealing.
4. The silicone seal holds well on a smooth surface. However, to improve the adhesion, I recommend that you sandblast it, emery cloth or other abrasive. Then wash the base again, wipe with solvent and dry. Next you can work with the sealant.

All silicone-based oven materials are painted red or brownish-reddish.

Heat-resistant analogues

The universal heat-resistant seal is made on the basis of silicates. The operating temperature regime that it can withstand is up to +1300º, and can withstand short-term exposure up to +1500º.

This type of furnace sealant can be used in areas of direct contact with an open flame. In this case, the packaging of the seal should be marked: “fireproof”.

• Heat-resistant seals are used:
• for repairing leaks in heating boilers;
• for sealing chimney pipes and sealing cracks in them;
• for sealing areas where brickwork is adjacent to furnace casting;
• for sealing fireclay lining of furnaces;

When installing a chimney made of sandwiches, it is also highly advisable to coat their modular joints with a similar product.

The exception is pyrolysis and condensation boilers; at their outlet the smoke temperature is up to +150º. Here you can use heat-resistant seals.
When you plan to make the chimney duct or other element collapsible, apply sealant only to the joints. By loosening the two sections and crumbling the seal, you can separate them.

If you apply a layer of the product over the entire surface, the structure will become monolithic. You won't be able to take it apart without damaging it. Silicate-based materials have good adhesion to stone, brick, concrete, metal, cement mortar

. However, I warn you that they are not firmly held on a smooth plane, as a result of which such surfaces require abrasive treatment before applying sealant. I would also like to note one point - the sealant can be applied only in the positive temperature range: +5/+40º. The best option

Having hardened, the heat-resistant composition creates a strong and rigid, i.e. not elastic seam. Based on this, silicate sealants can be used in areas that are not exposed to vibration or are subject to it to a small extent. Otherwise, the material will crack.

However, plasticity has its advantage - it makes it possible to paint the sealant. The silicone composition is distributed using a mounting gun and is no more than one centimeter thick.

Please pay special attention to the fact that some types of heat-resistant seals, if they come into contact with the skin, can cause chemical burns. Based on this, when working with your hands, wear rubber gloves and be careful.

Fire and heat resistant oven sealants are painted black or grey colour. They have no other colors.

1. They are not pure sealants, but rather a sealing adhesive.
2. These products are transparent and can withstand temperatures up to +200º.
3. Such compositions are chemically neutral, i.e. they do not react with salts and acids. The drying period is not affected by humidity and temperature. Thanks to this, they can be used outdoors and during the winter season.
4. Sealing adhesives are waterproof. Therefore, they can be used in rooms with high level humidity - in the shower, bath, bathhouse, etc.
5. The relative disadvantage of such compositions is that they are not high-temperature.

Of these sealants, I can recommend you the “Fix All” brand sealing adhesive from the Soudal company. It is not directly related to heat-resistant analogues, but is perfect for repairing leaks, cracks in heating networks, as well as hot water supply, both in the pipes themselves and in the fittings.

Popular product brands

Almost always, manufacturing companies write on the packaging of heat-resistant seals their main purpose. For example: “sealant for chimneys, fireplaces and stoves.” So, you can't go wrong with your choice.

1. "Soudal-C". The Belgian company Saudal produces a diverse range of sealing materials. These include heat-resistant analogues, as well as heat-resistant stove and fireplace seals “Soudal-Calofer”. Such compositions are painted black.

1. The Penosil company produces heat-resistant sealant for Penosil/+1500 ovens. It is black in color and can withstand temperatures up to +1500º. It polymerizes within 15 minutes.
   The company also has heat-resistant red analogues that can withstand temperatures up to +300º. They are acidic, so they cannot be used on concrete, cement and metal.
2. In the middle price segment you can also find seals that have good quality. For example, heat-resistant sealants of the Tytan and Bau-Master brands.

Under the Titan brand, a group of companies from Poland Selena-Group produces construction and Decoration Materials professional grade, including oven sealants. They are standardized and have DIN and ISO No. 9001 certificates.

The Tytan high-temperature seal is modified with fiberglass; it gives the material a high degree of gas and smoke resistance. It is able to withstand temperatures up to +1250º. This composition is suitable for chimney pipes and stoves.

Conclusion

Without pipe sealants, the effective operation of many utility networks is impossible. Depending on the type of network, you should use different types seals.

If you watch the video in this article, you will find out Additional information. Ask your questions in the comments.

So I say goodbye, and good luck to you in your endeavors!

July 25, 2016

If you want to express gratitude, add a clarification or objection, or ask the author something - add a comment or say thank you!

The main problem when operating pipelines made of various materials is the possibility of leaks at the junctions of individual pipeline elements. The question of how and with what should be used to seal sewer pipes, which usually have a bell-shaped design, is especially acute.

Separately, it is worth noting the need to join elements of sewer mains from dissimilar mains, and to insert individual branches in which it is impossible to use standard fittings. These sections of the pipeline are considered the most problematic, and the solution to the problem may differ in both cost and labor intensity of the process.

First of all, it is worth considering the need for high-quality insulation of the connection of elements of external sewer lines.

Whatever sealant you choose for sewer pipes (we are talking only about high-quality materials), it will solve two main problems:

• Preventing sewage leakage into the ground. The main task is not only to comply with environmental safety standards, but also to eliminate the possibility of flooding of underground parts of buildings (basements, basements).
• No less important is the elimination of leaks and ingress of groundwater or parts of the soil into sewer system. Soil water can seriously damage the movement of wastewater through the pipeline, in addition, there is the possibility of silting of the sewer system.

Eliminating the consequences of any of these problems will require a considerable amount of work. At the same time, the costs for excavation costs associated with opening the main line are practically no different from the costs of laying a new line. Therefore, it is economically feasible to purchase materials for sealing sewer pipes, rather than spending money on emergency response work.

Main types of sealants

It must be taken into account that most types of polymer pipes do not require additional insulation due to the use of rubber butt seals. Basically, means of sealing sewer pipes are necessary when laying cast iron or ceramic lines. Installation of elements of such pipelines requires the mandatory presence of a so-called expansion joint, which allows maintaining the integrity of the pipes during certain ground movements.

Whatever sealant for sewer pipes is chosen, it is necessary to follow the technology for its application, otherwise the use of even expensive materials may have zero effect. In practice, various types of materials are used that can provide high-quality sealing of joints, while most pipe sealants were known and effectively used by craftsmen several centuries ago. IN Lately

Polymer substances and various resins, including epoxy, were added to the list of sealing compounds.

• All existing sealants can be divided into two main classes:
• Products applied in the form of a paste (glue).

Self-adhesive sealant tape.

Both types of materials allow you to reliably seal and ensure the safety of fitting connections and individual sections of the pipeline. They are used not only when installing sewer systems, but also when making connections into pipelines, carrying out emergency restoration work, and eliminating emergency leaks.

Can be used for laying and repairing sewer lines made of metal (steel, cast iron), ceramic and polymer pipes.

There are two main types of silicone:

• Neutral, which is used in most cases, ensures reliable sealing of the elements.
• Acidic silicone is necessary for the installation of pipelines working with aggressive media.

Sealing sewer pipe connections with silicone is affordable, while ensuring guaranteed quality and durable operation of the joint. Today, this material is most popular both among professionals and when solving various everyday issues.

This type of sealant is a metallized tape on a bitumen-rubber base. An aluminum or copper layer provides sufficient strength and reliable sealing.

In order to achieve required quality connection using such a tape, you must remember the basic rules for its installation:

• Before use, it is necessary to carefully prepare the pipes or fitting; the tape simply will not stick to a dusty or damp surface.
• Winding should be carried out in a spiral, with an overlap of approximately 50%, this will ensure that the entire surface can be covered with two layers of tape.
• The winding should be carried out with a significant stretch of the self-adhesive, this will prevent the possibility of its spontaneous sticking after removing the protective layer and ensure uniformity of the coating (no wrinkles or other defects).

Today, self-adhesive tapes for sewer pipes are considered the easiest material to use, while they provide a high degree of sealing of various types of connections. Allows you to significantly simplify the elimination of emergency leaks.