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In most cases, when the home installation has been done correctly, there is a use special means called sealant. Sealant for the home heating system is a special tool designed to strengthen and seal joints and small cracks. The composition of the sealant for heating systems is based on special components that have a vulcanizable nature.

According to the latest data, among all varieties of sealant it is considered one of the highest quality and most popular - it is a universal heat-resistant sealant designed for. Often, the owners of heating systems use just this type of sealant, since this product has all the required characteristics for an insulating and fixing material.

In addition, the sealant is used not only in everyday life, but also for industrial use. This is a special viscous substance that has the property of resistance to high performance and increased speed solidification.

AT recent times has become widespread silicone sealant for heating. His unique properties characterized by high resistance to moisture, mold, and temperature fluctuations. Silicone sealant is often used in everyday life to isolate seams of various structures and types.

Silicone sealant

Rarer types of sealants in heating are the so-called urethane sealants, as well as polysulfide sealants used for home heating systems. But these sealants are not used everywhere, which is why it is important to carefully study their properties and description before using them for their intended purpose.

In addition to the standard, heat-resistant sealant, the heat-resistant type of this product is often used. Heat-resistant sealant has the ability to penetrate into the most hard-to-reach places and cracks. In addition to these properties, heat-resistant sealant has increased elasticity and viscosity.

In the heating system, the use of a heat-resistant sealant is expressed in gluing rubber as well as metal materials.

At the same time, each part to which this tool is applied is reliably protected from moisture. The heat-resistant sealant is regularly tested by highly qualified specialists. They study and constantly improve the properties of sealants.

In addition to heat resistance, the sealant is particularly resistant to various external factors and influences. These factors include the impact of direct sun rays, cold, wind. Also, sealant for heating is produced in various color solution which is perfect for any interior. When buying a sealant, you should pay attention that only trusted brands and manufacturers guarantee high quality its products.

When choosing from the options of sealant used for heating systems presented in stores, it is important to pay attention to its resistance to deformation. AT this case most suitable option an acid or neutral silicone sealant is used. You can also consider the option of a heat-resistant acrylic sealant.

acid sealant

In addition to these types of sealants, there are those that can be used where the effect of temperatures is especially strong, and the temperature reaches, sometimes up to a thousand degrees Celsius. The area of ​​​​use is fireplaces, chimneys.

It is important to remember that there is no universal sealant suitable for use in all situations. For each specific case, it is necessary to use a specialized sealant for specific conditions and materials.

The sealer is easy to handle possible option heating system leaks.

The procedure in this case is as follows:

• dismantling;
• the system is most completely filled with water;
• the system is heated to a certain temperature value;
• preparation of the sealant for application by mixing it to a homogeneous mass;
• removal from the system of such an amount of water that must then be changed to a sealant;
• pumping the sealant composition using a pump;
• the pump hose is connected to the heating system through a valve.
• open the heating valve.

Hand pump for pumping liquid sealant

After these manipulations, the minimum time of continuous operation of the system is seven hours. The recommended temperature is at least 45 degrees Celsius, and the pressure with a lower limit is from 1.1 Bar to 1.6 Bar.

It is especially important to remember that work with sealant must be carried out in compliance with all precautions, and a set of actions is carried out in strict accordance with the instructions. Storage of sealant in the vicinity of acid is strictly prohibited!

In case of contact with the sealant in the eyes or on the mucous membrane, it is necessary to immediately rinse with water, in case of irritation, it is necessary to consult a doctor as soon as possible.

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One of essential requirements for the heating system - this is the absence of leaks. Only the absence of coolant losses can guarantee a stable and economical operation of the equipment. Therefore, when installing and repairing heating Special attention is given to ensuring the sealing of joints and joints.

One of the most commonly used methods for joining parts of heating networks is a threaded connection. Consider the materials and methods by which they are sealed.

The most technologically advanced and fastest assembly method, which, however, is rarely used for heating systems. With this method, a part with an external thread during assembly compresses a gasket located on the narrowing of the counterpart. To ensure a tight joint, simply install a gasket (paronite, fluoroplastic, rubber) and screw the parts all the way. However, such a method requires precise machining of the profile of the internally threaded part, and it is difficult to achieve a transition without tapering. Therefore, this method of sealing threaded connections most often used for assembly measuring instruments and sensors, where the increase in hydraulic resistance is unimportant.

It can also be noted that even in this case, experienced locksmiths still additionally use sealant.

Sealing by winding FUM tape

In this case, a PTFE tape is used. This method allows you to quickly assemble threaded connections and reduces the force during make-up (due to the low friction coefficient of PTFE). Another advantage is high chemical resistance and durability.

But it also has some disadvantages:

1. when assembling connections with very smooth or coarse threads, the tape may be torn or extruded;
2. not suitable for joints that are subject to thermal deformations, since the tape does not adhere to materials and can be squeezed out during the “play” of the joint (of course, you can additionally use a sealant, but then the question arises why the tape is also needed);
3. does not provide reliable sealing of threaded connections with a diameter of more than 25 mm (unsuitable for assembling radiators of a heating system).

Sealing thread

It is also made of Teflon (fluoroplastic) or nylon, sealing with it has all the same advantages as sealing threaded joints with FUM tape and the same disadvantages, with the exception of a tendency to extrude or tear. Also unsuitable for assembling heating batteries.

Sometimes a thread is produced for impregnation of which a non-drying sealant is used, which improves its adhesion.

linen span

The most famous and used sealant for quite a long time. Used in conjunction with impregnation oil paint or red lead. Although there are more modern materials, linen span is still the most common material for assembling threaded connections for heating batteries. But still it has a lot of disadvantages:

1. Requires a certain skill for proper winding and coating;
2. Has limited durability;
3. Prone to dryness.

As an option to improve the quality of this sealing method, a liquid or paste-like silicone sealant is used for impregnation.

Drying and non-drying liquid and paste sealants

Most often they are made on the basis of silicone. They have sufficient heat resistance for assembling batteries and other elements of the heating system. Simplify the assembly of threaded connections due to the lubricating effect. If you apply a non-drying sealant, then the parts of the heating system will be easy to disassemble. The disadvantages include the fact that non-drying pastes can be squeezed out at high system pressure. The curing sealant may shrink and the bond may leak over time.

Sealant for a home heating system: rules for choosing and filling

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Any heating system, even the highest quality, sooner or later will require repair work. The easiest, most convenient and quite practical way to eliminate leaks that have appeared is the use of a sealant for a home heating system.

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Liquid sealant for heating systems closed type HeatGuardex BLOCKSEAL 100 HD

Varieties

There are many sealants currently in use.

All sealants are suitable for certain living conditions, however, for the reconstruction of heating equipment, special sealants for heating systems will be optimal.

Based on the chemical composition, the following types of sealants are distinguished:

1. Acrylic. They are characterized by low stability, intolerance to temperature changes.
2. Polyurethane. They have elastic properties, are distinguished by high adhesion to metals, as well as resistance to temperature extremes and corrosion processes.
3. Silicone. The most common type of universal sealing agents, they are always elastic and resistant to moisture in a wide temperature range, they serve for a long time.

Silicone sealant to eliminate leaks in a heating system with metal elements should only be of a neutral variety, but not acidic in any way, since the acetic acid contained in the acid sealant will cause rapid metal rusting.

Anaerobic blue sealant for threaded and flanged metal joints

Temperature-resistant sealant for heating pipes is used specifically for materials made of metal and polymers. This tool perfectly copes with its task - it does not allow moisture to penetrate from damaged elements of the heating system.

A sealing agent that is a viscous mass and quickly hardens at the application site, and in the future is resistant to temperature heating.

When sealing threaded connections in modern heating systems, instead of linen tow and FUM tapes use an anaerobic adhesive sealant.

Such a tool does not harm the environment and is used in heating and plumbing networks.

When using an adhesive sealant, there is no need to use other sealing methods for threaded connections.

A sealing agent in the case of heating boilers is necessary to eliminate cracks in places where the material must be resistant to temperatures up to 1500 °C.

Sealant allows you to seal gaps in and smoke paths of boilers and stoves. After hardening in the seams between the surfaces of various materials(metal, brick, concrete) means keeps tightness.

In addition, sealants for heating systems based on oligomers are isolated. They also have different terminal functional groups:

• polyurethane;
• polysiloxane;
• polysulfide.

Often they are used in construction work. They, in some brands, can be used to seal heating systems. However, when choosing such options, it is worth without fail study the manufacturer's instructions.

Liquid sealant for heating system

For repair work of the heating system, it is not always possible to use external agents. What to do, for example, if the leak site cannot be detected due to the fact that hidden piping was made in the housing and a warm floor was installed? The thought of having to break walls and open floors is not particularly encouraging. In such cases, use quite new way getting rid of leaks - by pouring liquid sealant for heating pipes into the system. This sealant is also suitable for radiators when it is not possible to apply a clamp to a leak.

A feature of liquid sealants for a heating system is their ability to remove leaks not by applying to a damaged area from the outside, but directly from the inside.

High resistance to elevated temperatures of some special sealants allows them to be used for quick repair of heating boilers.

essence this method in that, coupled with the coolant, the sealant remains liquid, and only upon contact with air penetrating into the system does it polymerize. Having hardened, the accumulations of sealant seal the cracks from the inside specifically in those places where the integrity of the system is broken.

There are several varieties of liquid sealants on the market, and all of them are designed for specific conditions of use, including:

1. In systems where the heat carrier is water or.
2. In gas or solid fuel boilers.
3. In pipes for plumbing and heating.

In emergency situations, you can pour a sealant into the heating system, which is used for radiators in cars.

No need to look for any one universal sealing agent. It is more efficient to buy a specialized composition for certain parameters of your own heating system.

Popular among buyers is a liquid sealant for a heating system, which is produced by BCG from Germany. The use of this brand is considered great solution to remove hidden leaks of the thermal carrier. When used correctly, the liquid sealant is not dangerous for heating boilers and does not harm the circulation pump, as well as measuring instruments.

Sealing agent for pipes and radiators must be in the system for a long time. Once you add this sealant to it, you can forget about leaks for the next few years.

Means for sealing in closed heating systems eliminate pressure losses that are associated with leaks in pipes and radiators, but they will not be able to help out in the event of a violation membranes in the expansion tank.

Preparatory work before using sealant

The selection of a sealing agent for heating systems is carried out taking into account the type of the latter and the heat carrier used. If you make a mistake with the choice, then this can contribute to clogging of pipes in arbitrary sections.

It was already mentioned in the article above that there are currently three liquid sealant options on the market, based on application conditions. This needs to be taken into account.

It is worth deciding on the required concentration of the agent added to the coolant. The quality of the sealing of the leak that has appeared largely depends on this. If the system loses up to 80 liters of the total volume of the heat carrier per day, then adding one liter of sealing agent is enough.

The total volume of the house heating system is calculated by adding up the volumes of pipeline networks (pipe length per diameter), radiators and boiler (from the technical data sheet).

You can also use another method. Drain the coolant into one container of a specific volume.

Let's move on to setting up the heating system for filling.

It is necessary to bleed all the air! Otherwise, the sealing agent will polymerize on contact with air, which will lead to accumulations in the heating pipes.

All taps present in the network should be opened, this will allow the product to circulate freely and remain in all working areas of the heating system. In the first standing radiator (in the direction of circulation of the product), it is worth completely unscrewing and installing the pump in this place, with which the sealant ends up in the system.

After that, you need to start heating and warm it up to 60 ° C. In time, it will take about an hour, an hour and a half (in country house). The pressure in the system must be at 1.5 bar.

Before starting all of the above work, all installed filters overlap or be removed, because the sealing agent that has got into them will disable them completely.

fill

About a bucket of heated heat carrier is poured into a separate clean container. In the other - another half a bucket (for future washing). The tool is worth a chat and pour into a bucket. Make sure that the sealant does not come into contact with air for a long time. It must be quickly pumped into the heating system.

Again, the air is removed from the networks.

The sealant circulates through the heating circuits for several hours. The entire process of sealing gaps and leaks will be completed in four days. On the fifth day, you need to test the system under strong pressure.

And remember that heating sealant is definitely worth using to prevent leaks. And even though its cost will seem quite high to many. Hidden reconstruction of heating pipes is both a convenience and at the same time, a certain risk, for which sometimes you have to pay.

Any, even the highest quality, heating system (CO), sooner or later, needs to be repaired. The simplest, most convenient and enough effective method the elimination of leaks that have arisen (especially in CO recessed into the wall) is the use of a material such as a sealant for a house heating system.

Today on the market there are a lot of sealants for various purposes and composition. All brands can be divided into several main groups (according to the type and chemical composition of the base).

Sealants based on oligomers

They also have different terminal functional groups:

• polyurethane;
• polysulfide;
• Polysiloxane.

They are widely used in construction and, in some modifications, can be used for sealing CO. But, when choosing such brands, you must first read the manufacturer's instructions.

Acrylic

Only certain brands are suitable for use in the repair of CO, because most of these products poorly withstand temperature extremes and significant temperatures.

You should choose a liquid sealant for the heating system.

Thiokolovye

They are used exclusively in construction and do not belong to the group of heat-resistant sealants.

Silicone

They represent a universal group of sealants. They also include heat-resistant (high-temperature) sealants, which, first of all, can be recommended for sealing CO in apartments and individual houses.

This sealant for fixing leaks in the heating system has the necessary durability and heat resistance. AT retail chains comes in two forms: liquid and paste. The latter version provides increased thixotropy of the sealant.

It has excellent adhesion to almost any surface and vulcanization of the original composition at room temperature, resistance to aggressive substances and moisture, and significant elasticity. The material easily seeps into any cracks and joints and is environmentally friendly.

Said sealant for heating pipes is designed for operation at temperatures of -60°/+250° and has the possibility of short-term preservation of its properties at +300°.

When applying such sealants, it must be remembered that they, in turn, are divided into two groups:

• neutral;
• acid.

When used to eliminate places of leakage of CO, if the latter includes metal elements, acid sealants are not applicable. Since acetic acid, which is part of their formulation, accelerates corrosion processes.

Depending on the tasks to be solved, a sealant is selected to eliminate leaks in the heating system. The sealing of threaded joints is perfectly performed by paste-like silicone sealant. Brands currently available:

1. Drying sealant. After complete drying, it shrinks, which can (if the drying technology is violated) lead to streaks and cracks;
2. Non-drying sealants. An excellent choice for fixing small leaks and sealing threaded connections (their disassembly is facilitated). Disadvantage - squeezed out under overpressure in a joint system.

Anaerobic sealants (a type of acrylic) are also widely in demand for sealing heating systems. This sealant for heating radiators is resistant to temperature fluctuations, has the necessary strength to mechanical stress, alkaline and acid solutions (which allows you to clean CO with special chemical compounds).

When it enters any closed airless space (crack, etc.), it fills the entire volume and quickly hardens, forming a homogeneous polymer mass. This reduces the required force when screwing threaded connections, but makes them very difficult to dismantle.

How to use sealant to fix a leak?

It is far from always possible to repair CO only by external means (concealed wiring, heated floors). In such a case, universal heat-resistant liquid sealant for heating pipes is poured into the system.

In cases where elimination emergency requires immediate action, and there is no required brand of sealant, you can use the sealant of those brands that are intended for automotive radiators.

Preparation for work

Sealant for heating boilers is selected taking into account the type of the latter and the coolant used. An error in selection can cause blockage of CO pipes in arbitrary places.

Modern liquid brands of sealants for the purpose in question are usually divided into three groups (according to the conditions of use):

• for work on CO, the coolant in which is either water or antifreeze;
• for sealing CO pipes (water supply);
• The heating boiler runs on solid fuel or gas.

The best solution today is considered to be the German liquid sealant for the heating system produced by BCG. Eliminates leaks and does not negative impact on the boiler and installed in the central heating system.

It is important to determine the required concentration of the binder that is added to the coolant. This largely determines the quality of stopping the leak that has arisen. If during the day up to 80 liters of the total volume of the coolant flows out of the system, then it is enough to add 1 liter of sealant.

The total volume of house CO is calculated as the sum of the volumes of pipelines (pipe length per diameter), batteries and boiler (from the data sheet).

It can be made easier. Drain the coolant into a single container(s) of known volume.

High-temperature sealant for heating boilers and heating systems in general is added to the system for more than one year, and allows you to eliminate leaks during this period, preventing a pressure drop in CO. But only in pipes or radiators. If a malfunction occurs in the expansion tank, the above method will not help.

CO setting for pouring

All (IMPORTANT!) air is vented. Since, otherwise, the sealant, under the action of the air remaining in the system, will begin to polymerize in any place, which can lead to blood clots in the CO pipes.

All valves available in the system should be opened, which will allow the sealant to circulate freely and get into all working areas of the CO. In the first radiator (along the way the sealant moves), the Mayevsky valve should be completely unscrewed and a pump should be installed in this place, with which the sealant is pumped into the system. After that, you should start the heating system and warm it up to a temperature of 60 ° (this will take about an hour - one and a half, in a private house). In this case, the pressure in the system should be at the level of 1.5 bar.

Prior to the start of the above works, all installed filters are blocked or removed, because. sealant that gets into them will completely disable them.

Pouring process

About a bucket of heated coolant is drained into a separate clean container. another 0.5 buckets (for subsequent washing). Sealant should be shaken and added to the bucket. Do not allow prolonged contact of the solution with air. It should be promptly uploaded to the CO.

Re-bleed the CO lines.

The solution disperses throughout the system within a few hours. Complete sealing of all cracks and leaks will be completed within 4 days. Fifthly, you should check the system under excess pressure (pressure testing).

Water / gas BCG 30E - leak in water type heating system, gas boilers

Liquid sealant BCG 30 E (Germany) allows you to eliminate leaks in a water-type heating system, gas boilers. BCG 30E avoids water loss up to 30 l / day, is used to eliminate leaks during the repair of heating boilers, pipes, boilers, also helps to eliminate leaks in underfloor heating systems, at points of soldering pipes made of plastic or metals. If the question arises of how to eliminate a leak in a pipe, BCG 30E solves the problem from the inside.

Antifreeze BCG F - will eliminate the leak in the heating system with antifreeze

This anti-leak pipe sealant repairs a heating system that is filled with antifreeze and eliminates pipe and boiler leaks. BCG F is able to eliminate a coolant leak up to 20 liters. per day. Elimination of leaks in the materials of the system made of metal and plastic.

Water / diesel fuel BCG 24 - repair of heating boilers and leaking pipe connections

Self-sealing sealant for pipes BCG 24 of the German manufacturer is able to eliminate leaks and water losses up to 30 liters per day. It is used for plastics and metals, and also repairs heating boilers, and if the pipe connection is leaking.

Underfloor heating BCG - eliminate the hidden leak of the warm floor

BCG Underfloor Sealant is used in heating systems with water and gas boilers. It is suitable for plastic and metal materials, pipes and underfloor heating. Where there is a heating leak, ageless rigid and elastic seals are formed. To obtain a lasting effect, BCG liquid sealant must be left in the system to eliminate leaks, then the repair of the “warm floor” system will be of high quality.

Cleaning the BCG HR system - cleaning the heating and plumbing system

Special chemical composition allows you to remove scale, rust and dirt in the pipes in which it is located hot water. The BCG HR cleaner can be used to remove contaminants in steel, aluminum and plastic pipes.

Leak 400 liters per day BCG SPEZIAL.

Sealant to eliminate leaks in heating pipes and boilers is used for coolant losses up to 400 liters per day. It is able to eliminate leaks in the heating system, boiler, pipes from the inside. BCG SPEZIAL is used for plastics and metals. Upon contact with air, the sealant seals and eliminates the leakage of the heating system and pipes. This sealant is hard, durable and does not age. BCG SPEZIAL is used for heating systems, boilers and pipes.

Leak 1000 liters per day BCG TD.

BCG TD sealant is used in situations where coolant losses are 400-1000 liters per day. This sealant can eliminate leaks in heating systems, pipes, boilers. It is used for plastic and metal in different types systems to eliminate the leak in the heating pipe.