The characteristic features of a properly working heating system are always warm in the house, stable coolant pressure in the circuit, and no leaks. Reliability is laid even at the installation stage, which depends on the skills and qualifications of the installer. But sometimes leaks do happen, giving users a lot of problems. Let's see how to get rid of the leak and achieve the tightness of the system even at the stage of its construction.

In this review, we will cover the following topics:

• How best to seal the pipe joints.
• How to get rid of a visible leak.
• How to get rid of a hidden leak.

We will give detailed instructions for each question.

Old ways of sealing

There are three main types of sealant for their intended purpose. The first type is for sealing pipe joints. The second is for outdoor use, used to repair pipes. The third is sealing compounds for pouring into the heating system. This is more than enough for our review.

Many of us remember that no heat sealant was used before. His role was played by the FUM tape, which is still in service. It is a fluoroplastic film that is highly stretchable and capable of sealing pipelines for various purposes. It is used in the installation of heating systems, it is used when laying a water supply system. When wound around the threaded connection, it provides excellent sealing properties.

Instead of fluoroplastic sealing material, synthetic flax is often used. This is a thin flexible thread more universal use- it is suitable for gas pipelines, water pipelines and hot water heating systems. Many experts, choosing between FUM-tape and flax, opt for the latter.

Joint sealant

Liquid sealant for the heating system will allow you to get rid of both the capricious FUM tape and artificial flax. Its advantages:

You shouldn't think that liquid sealant glues pipes tightly - nothing prevents the fitting from being ripped off wrench with the same effort as if there was a FUM tape inside.

• Ease of use - apply to the pipe and twist, no pain with tape or linen. The sealant has excellent adhesion to plastic and metal, which allows it to be used in any type of heating system.
• Withstands heating - optimal for heating pipelines.
• It tightly clogs the joints - many times better than fluoroplastic or flax.
• Withstands high pressure- whatever happens in the heating system, the connections will remain tight.

Please note that liquid sealants are available in several versions - under different temperatures, drying and plastic, with different strength of fixation (just like gel or hairspray).

Anaerobic heating sealant is not liquid - it looks like a gel. It is easy to use it - we degrease both (!) Surfaces, apply the composition on them, twist and wait for drying in accordance with the instructions for the selected product. Twisting with bearish force is not at all necessary - after drying, the sealant will provide proper tightness without undue titanic efforts.

Leak Sealant

Heat-resistant sealants for radiators, pipes and boilers - here next topic... They provide reliable sealing of leaks, but only from the outside. Boiler modifications withstand without problems high temperatures working in difficult conditions... Similar samples are used to repair car engines.

This liquid sealant is based on silicone. He is not able to penetrate the smallest cracks, therefore renovation work in heating systems are carried out using fiberglass reinforcing mesh. Its second name is Serpyanka. It is sold in all building stores, in its own way outward appearance resembles a plastic mesh for wooden vents.

To eliminate leaks in the heating system with metal pipes choose a sealant that does not form acetic acid during the drying process. It is not terrible for plastic, but corrosion centers subsequently appear on the metal. Pipe repair is carried out in accordance with the following instructions:

When choosing a sealant for a home heating system, pay attention to silicone varieties from trade marks Moment and Macroflex.

• We find the place of leakage, release the pressure in the heating system until water stops flowing from the gap.
• We dry the place of damage, remove dirt, thoroughly degrease.
• We apply thin layer liquid silicone sealant, on top we wind the serpentine in one layer without overlapping layers.
• We repeat the procedure 3-4 times, but with an overlap of layers.
• We bring the serpyanka to clean pipe sections on both sides of the damage site, fix it until the sealant dries.
• Apply the last layer of sealant to the patch, spread it over the entire surface;
• After the silicone hardens, we cut off unnecessary pieces of the serpyanka.

Sealants for interior renovation

Humanity has not yet invented universal sealing compounds. Therefore, each type of repair uses its own funds.

Heating systems with hidden pipes are becoming more common. The pipes are hidden in walls or floors, only batteries and control elements are visible from the outside. Repairing such systems is a whole problem. It's one thing when a leak is discovered during the finishing or final construction phase. And it's another matter when the house is already completely ready to move in.

No one will want to open the floors and walls - this will lead to large labor and financial costs. But it is possible to carry out repairs directly from the inside, and without direct access to the leak. For this, liquid sealants for heating pipes are used, poured directly into the coolant. It cannot be said that such a scheme will give a 100% result, but the chance to restore the tightness of the circuit is quite high.

Step-by-step procedure for repairing a heating system with a liquid sealant:

Heating pipe silicone sealant is suitable for repairing open pipe sections. But with the internal arrangement of pipes, it is useless.

• We select the sealing compound itself - in accordance with the heat carrier used and the pipes used.
• We release the pressure in the circuit, open all the taps - the coolant must circulate freely.
• Instead of the first after the boiler, the Mayevsky crane is screwed in flexible hose for supplying heat carrier with sealant.
• We connect the hose to the pump for pressure testing of heating systems.
• We dilute the sealant in a bucket of the coolant drained from the system.
• Pour the solution into the pump, pump it into the heating circuit.
• We raise the pressure to 1.5 atmospheres, set the temperature to no higher than +60 degrees.

After starting the circulation, the liquid sealant dissolved in the coolant will hit the road. Where there is a leak, it will go outside the pipe - the polymerization reaction will begin. The leak will be repaired after 3-4 days.

Please note that polymerization occurs on contact with air and some other media. Therefore, there should be no air pockets in the heating system. The same property of a liquid sealant is its disadvantage - it can partially settle on thermo-mixing valves and taps, react with air bubbles formed in the circuit.

This technology is not fully debugged. There are dozens of types of liquid sealant on sale, but not all of them are suitable for solving certain problems. Some modifications work with small slots, but fail in front of large leaks. Others have diametrically opposite effects. Therefore, no one will give guarantees for this method of repair. If there is a need to restore the tightness of the heating system with sealing compounds, consult with specialists.

Any, even the highest quality, heating system (CO), sooner or later, needs repair. The simplest, most convenient and sufficient effective method 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 home heating system.

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

Oligomer based sealants

They also have different terminal functional groups:

• Polyurethane;
• Polysulfide;
• Polysiloxane.

They are widely used in construction and, in some modifications, can be used to seal CO. But, when choosing such brands, it is imperative that you first familiarize yourself with the manufacturer's instructions.

Acrylic

Only some brands are suitable for use for the repair of CO, because most of these products do not withstand temperature extremes and significant temperatures.

You should choose a liquid sealant for the heating system.

Thiokol

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

Silicone

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

This sealant for eliminating leaks in the heating system has the required durability and temperature resistance. V retail chains comes in two forms: liquid and pasty. The latter version provides increased indicators of the thixotropy of the sealant.

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

The mentioned sealant for heating pipes is designed for operation at temperatures of -60 ° / + 250 ° and has the ability to preserve its properties for a short time at + 300 °.

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

• neutral;
• acidic.

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

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

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 sealing small leaks and sealing threaded connections (easier to disassemble). Disadvantage - squeezed out under overpressure in a system of joints.

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 influences, alkaline and acid solutions (which allows you to clean CO with special chemical compounds).

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

How to use a sealant to repair a leak?

It is far from always possible to carry out the repair of CO only with external means (hidden wiring, underfloor heating). In this case, a 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 a sealant of those brands that are intended for car radiators.

Preparation for work

A sealant for heating boilers is selected taking into account the type of the latter and the heat carrier used. An error in the choice can cause blockage of the CO pipes in arbitrary places.

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

• for operation on CO, in which either water or antifreeze acts as a coolant;
• for sealing CO pipes (water supply);
• the heating boiler runs on solid fuel or gas.

The best solution today is BCG's German heating liquid sealant. Eliminates leaks and does not negative impact to the boiler and installed in the central heating system.

It is important to determine the required concentration of the binder to be added to the coolant. This largely determines the quality of stopping the leaks that have 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 a boiler (from the data sheet).

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

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

Setting up CO for pouring

All (IMPORTANT!) Air is vented. Otherwise, the sealant, under the influence of the air remaining in the system, will begin to polymerize in any places, which can lead to the formation of blood clots in the CO pipes.

All valves 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 path of the sealant movement), you should completely unscrew the Mayevsky valve and put a pump 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 ° (it will take about an hour - one and a half, in a private house). In this case, the pressure in the system must be at 1.5 bar.

Before the start of the mentioned works, all installed filters overlap or are removed, because the sealant trapped in them will completely disable them.

Pouring process

Approximately a bucket of heated coolant is drained into a separate clean container. another 0.5 buckets into the other (for subsequent rinsing). Shake the sealant and add to the bucket. Avoid prolonged contact of the solution with air. It should be promptly pumped into CO.

Perform air removal from the CO lines again.

The solution disperses through the system within a few hours. Complete sealing of all cracks and leaks will be completed within 4 days. On the fifth, check the system under excess pressure (pressure test).

It can be modern, include expensive devices with sophisticated automation. But if the connections are leaking, you don't even need to talk about the heating efficiency. Constant leaks, pressure loss.

Numerous problems will turn your life into a constant struggle with accidents. And it is quite simple to fix the situation. It is necessary to apply a special heating sealant at all docking points, and, at least, it will be possible to forget about leaks for the coming years.

On older systems open type it was enough to lay tow at the places where the pipes were connected to the boiler and, and the heating worked normally, but it was not very efficient. Today on the market you can find modern materials that are easy to apply and provide a secure connection of the elements. The main task of the sealant is to dock surfaces so that they do not allow water or air to pass through. Moreover, the materials used for heating circuits must have specific properties:

• Durability - given the difficulty of replacing them, it is necessary that they retain their properties for as long as possible;
• Heat resistance - due to the conditions in which all elements work, and frequent temperature changes, the joints must be designed for various thermal changes;
• Chemical resistance - various fluids can be used as a coolant, including those that aggressively act on parts of the circuit. The sealant should not disintegrate or lose its properties when interacting with antifreeze.
• Ease of application - sometimes it is necessary to seal the connections without the possibility of disassembly.

What type of sealant can you choose

Heating system elements can be connected in several ways. They can be securely fastened by welding, but in this case there is no possibility of disassembly if the structure is necessary. The use of flange connections is not always convenient and is more common when installing heating plant elements. The most popular is the threaded connection, the easiest to assemble, but necessarily requiring the use of seals, which can be divided into several categories in terms of composition:

• Solid, including various washers and rings;
• Elastic, made from fabrics or threads;
• Liquid or viscous formulations.

Each type of sealant has its own advantages and features of use.

End gasket

From the point of view of manufacturability, this is the most interesting option... A gasket made of paronite, fluoroplastic or just rubber is taken, placed on a part with a narrowing, into which the thread is cut, and pressed with a counter part. When tightening the threaded connection, the gasket is compressed and tightly closes all the cracks. Despite the simplicity of assembly, this seal has several disadvantages:

• It is ineffective without precise machining of parts;
• To connect, you need the part to have a narrowing;
• The hydraulic resistance increases.

Such a connection is usually used when installing sensors, and is rarely used in the heating circuit.

This material has a low coefficient of friction, due to which the assembly does not require a lot of effort in the threaded connection. With the help of FUM tape, you can quickly join parts. This material will last a long time and will not react to chemical attack. Its use is limited by several features:

• When the size of the connected parts exceeds 25 mm, the sealing deteriorates significantly;
• The tape can break when sealing elements with a coarse thread;
• PTFE has low adhesion and can be squeezed out when joining parts subject to thermal deformation.

This material is not suitable for mounting radiators.

Sealing with special thread

The thread is made from a type of fluoroplastic, Teflon, and has all the properties inherent in FUM tapes. It is even more prone to tearing and extrusion. Thread adhesion will increase when impregnated with a non-drying sealant.

Linen span

This sealant has been known for a long time and is widely used today in heating systems. The seal is especially convenient for connecting radiators. At the same time, it is impregnated oil paint... The disadvantages of such compounds include:

• The need for a certain level of qualification for correct winding;
• Not too long service life;
• The possibility of drying out.

These problems can be avoided by using silicone sealant for impregnation.

Liquid and paste seals

These substances are the most convenient to work with and highly technological. Depending on the composition, they have various properties and are divided into several types:

• Acrylic - rarely used in heating systems, as they are not designed for temperature drops;
• Polyurethane - heat-resistant and non-corrosive, have high adhesion to metals, elastic, but quite expensive;
• Silicone - the most versatile, they combine durability with the retention of characteristics at any temperature conditions.

The latter can be produced in several modifications. For fastening metal parts a neutral option is used, since an acidic one can corrode the metal.

From the point of view of changing the state, sealants can be drying, hardening some time after application, and non-drying, convenient for application, but capable of squeezing out when the pressure in the system rises.

If the hardened seal shrinks over time, this can lead to a leakage of the connection. The most reliable sealing method can be a combination of one of elastic sealants with silicone.

How to eliminate a leak without dismantling the structure

Sometimes leaks occur in places that are difficult to access or require disassembly of not only the system, but also the elements of the building. Crevices can appear in pipes that are cemented in the wall, or in hidden underfloor heating systems.

For such cases, a liquid heat-resistant sealant is used. This new material it is poured directly into the system or into the radiator if a leak has formed in it.

It is added to the coolant and remains liquid until it reaches a leak through which air seeps through. When interacting with oxygen, the substance polymerizes. It does not harden immediately. Gradually, these particles from the inside close the gap. For various conditions, you can purchase certain kind liquid sealant:

• For gas and;
• For heating pipes;
• For water or used as a heating medium.

You need to purchase a seal that is suitable for a particular case. Do not use it for other purposes.

The liquid sealant is designed for use with heating equipment and does not cause damage. Many manufacturers indicate this in their product descriptions. Once such a substance is poured into the circuit, there is no need to drain the water after sealing the gap formed.

The sealant will circulate in the pipes without affecting the heating efficiency, but its special properties will manifest when a leak occurs. Thus, for several years you can not think about the appearance of leaks. The only device that it does not work on is the expansion tank.

Failure to apply liquid sealant can reverse this effect and cause pipe blockages. It is better to consult with a specialist before using it and check that several conditions are met:

• The expansion tank is in good condition and does not cause a drop in pressure;
• The selected brand of sealant can be used with this coolant;
• The installed boiler can be operated using this substance;
• The concentration of substances is selected correctly.

Sometimes for heating systems, a means is used to seal the car's radiator.

Criterias of choice

The main condition for choosing is the ability to tolerate deformation well. The sealant must be resilient and resistant to temperature changes. Therefore, when purchasing an acrylic seal, make sure it is suitable for heating. It is better to use a silicone sealant more suitable for.

Water / gas BCG 30E - leakage in hot water heating system, gas boilers

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

Antifreeze BCG F - eliminate leaks in the heating system with antifreeze

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

Water / diesel BCG 24 - repairing heating boilers and leaking pipe connections

The self-sealing pipe sealant BCG 24 from 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 performs repairs and heating boilers, and if the pipe connection is leaking.

Underfloor heating BCG - will eliminate the hidden leak of underfloor heating

BCG underfloor heating sealant is used in heating systems with water and gas boilers... It is suitable for plastic and metal materials, pipes and underfloor heating. Where heating leaks occur, ageless, rigid and elastic seals form. To obtain a long-term effect, BCG sealant is liquid, to eliminate leaks, it must be left in the system, then the repair of the "warm floor" system will be of high quality.

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

The special chemical composition allows you to remove scale, rust and dirt in pipes containing hot water. BCG HR Cleaner can be used to remove contaminants in steel, aluminum and plastic pipes.

Leak 400 liters per day BCG SPEZIAL.

A sealant to eliminate leaks of heating pipes and boilers is used with a loss of heat carrier per day up to 400 liters. It is able to eliminate leaks in the heating system, boiler, pipes from the inside. BCG SPEZIAL is used for plastics and metals. On contact with air, the sealant seals and seals the leakage of the heating system and pipes. This seal is solid, durable and will 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 heat carrier 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 leaks in the heating pipe.

There are no ideally mounted heating systems, and therefore sooner or later it is discovered that the coolant is leaking. Sealants for heating systems are capable of eliminating leaks. The polymeric substances included in their composition are suitable for sealing gaps in the joints of pipes, radiators and even boilers. We propose to consider the advantages of a liquid sealant for heating in comparison with conventional sealants, as well as the rules for its use.

Types of sealants

In today's everyday life, it is used a large number of means with sealing properties.

According to their chemical composition, sealants are divided into the following main types:

• acrylic- unstable, do not tolerate temperature changes;
• polyurethane- elastic, have high adhesion to metals, resistant to corrosion and temperature;
• silicone- the most common type of universal sealants, retain elasticity and moisture resistance in a wide temperature range, are durable.

When sealing leaks in metal elements of the heating system silicone sealant it is permissible to use only its neutral variety, but not acidic, since the acetic acid contained in the acidic sealant will cause active corrosion of the metal.

Heat-resistant sealant for heating pipes is used in relation to metal and polymeric materials... This tool regularly fulfills its purpose - to prevent moisture penetration from damaged elements of the heating system. The sealing substance, which is a viscous mass, hardens rather quickly at the application site and subsequently withstands high temperatures.

For sealing threaded connections in modern heating networks instead of linseed tow and FUM tapes use an anaerobic adhesive sealant. The ecological harmlessness of such a sealing agent makes it possible to use it not only in heating systems, but also in plumbing systems.

A sealant for heating boilers is used to eliminate gaps in places where the temperature resistance of the material up to 1500 ° C is required.

With this tool, it is possible to seal cracks in heat exchangers and chimneys of boilers and furnaces. After hardening in the seams between surfaces made of different materials(metal, brick, concrete) the substance retains its tightness.

The Better Liquid Sealant For Heating Repair

It is not always possible to use external agents to repair heating. What should be done, for example, if the place of leakage cannot be found, because hidden piping was installed in the house and a warm floor was installed? Do you have to break down walls and rip up floors? No, you don't have to! In such situations, apply relatively new method elimination of leaks - by pouring liquid sealant for heating pipes into the system. Such a sealant is also suitable for heating batteries, when it is impossible to put a clamp on the leak.

The fundamental difference between liquid sealants for a heating system is their ability to eliminate leaks not by applying to the damaged area from the outside, but directly from the inside.

The essence of this method is that in a mixture with a coolant, the sealant remains liquid, and only when it comes into contact with the air entering the system does it polymerize. Gradually hardening, clots of sealant are sealed from the inside of the cracks in precisely those places where the integrity of the system is violated.

Several types of liquid heating sealants are produced, each of which is adapted to special conditions applications, in particular:

• the coolant is water or antifreeze;
• gas or solid fuel boiler;
• heating or water pipes.

You should not try to look for any one universal sealant for your home heating system. It is better to purchase a specialized compound for the specific parameters of your heating system.

The most famous among consumers are liquid sealants for heating systems produced by the German company BCG. The use of these funds is considered ideal solution to eliminate hidden coolant leaks. At correct use liquid sealant does not pose a danger to heating boilers and does not cause damage circulation pump and measuring instruments.

The pipe and radiator sealant must remain in the system long time... Once you add this sealant to the heating system, you can forget about leaks for several years.

Sealants for closed systems heating eliminates pressure losses associated only with leaks in pipes and batteries, but are powerless in cases where the membrane in the expansion tank is broken.

Steps to eliminate the leak with liquid sealant

The procedure for using liquid sealants to repair a home heating system can seem daunting. In some cases, clots of sealing liquid cause partial blockages and impede the movement of the coolant. Therefore, in order not to harm the heating equipment due to your inexperience, it is better to invite a specialist. In any case, you need to study the instructions for using a specific type of sealant for heating batteries and strictly follow it.

Once you decide to use a liquid sealant to fix a problem in your heating system, you need to make sure that:

• the reason for the drop in pressure is precisely the leakage of the coolant, and is not associated with a malfunction of the expansion tank;
• the selected type of sealant for heating systems corresponds to the type of heat carrier in this system;
• the sealant is suitable for the given heating boiler.

When using liquid pipe and radiator sealant, it is important to maintain the correct concentration. On average, its values ​​are from 1:50 to 1: 100, but it is desirable to determine the concentration more accurately, since the effectiveness of eliminating leaks can be influenced by such factors as:

• coolant leak rate (up to 30 liters per day or more);
• the total volume of water in this heating system.

If the volume does not exceed 80 liters, 1 liter of sealant will be sufficient to fill the heating system. But how can you more accurately calculate the volume of water in the system? It is necessary to calculate how many meters of pipes and what diameter were laid in the house, and then enter this data in any of online calculators... To the resulting volume of pipelines, it is also necessary to add the passport characteristics of the volumes of all radiators and the boiler.

You can drain all the water from the system into a certain container, the volume of which is precisely known, and then refill the system.

Heating system preparation

• Dismantle or cut off all filters with taps so that they do not get clogged with a viscous solution of sealant for heating systems;
• Unscrew Mayevsky's tap from one radiator (the first in the direction of movement of the coolant) and connect a pump to it (of the "Kid" type);
• Start the heating system and let it warm up for an hour to a temperature of 50–60 ° C at a pressure of at least 1 bar;
• Open all valves on pipelines and radiators for free passage of sealant through them;
• Remove air from the entire system, including radiators and circulation pump.

If you do not bleed the air completely, it will begin to react with the sealant and cause it to thicken at all in the wrong places where it is needed to eliminate the leak.

Sealant preparation

Solutions of sealants for heating systems must be prepared immediately before use so that the liquid does not come into contact with atmospheric air for too long.

Filling with sealant

Liquid sealant for heating systems must have time to mix with the coolant before it reaches the boiler, so it is more expedient to pour it into the supply:

• Introduce a liquid sealant solution into the system using a pump;
• Pump the remaining hot water so that absolutely all the sealant residue gets into the system;
• Release air from the system again;
• Raise the pressure to 1.2–1.5 bar and maintain the operating cycle of the system for 7–8 hours with a temperature of 45–60 ° C. This period is needed for the complete dissolution of the sealant in the coolant.

Work heating equipment should not be discontinued for several days until the heating liquid sealant has cured.

How does the sealing effect manifest itself?

Leak elimination should not be expected immediately, but only on the 3rd or 4th day. During this time, the sealant for heating pipes will seal and close the cracks in problem areas from the inside. The elimination of the problem of coolant leakage will manifest itself in the fact that the sound of falling drops of liquid will no longer be heard in the house, the moistened places on the floor will dry out, and the pressure in the system will stop decreasing.

At the same time, one of the negative effects can be a slight blockage of passages in devices for distributing the coolant flow, as well as in thermostats. But this problem can be easily solved by periodically opening and then adjusting these kinds of controls to prevent them from sticking further.

When working with liquid sealant for heating systems, the same strict precautions must be taken as prescribed for working with all kinds of chemicals!

A video lesson will help you understand how to independently eliminate a leak in the heating system using a liquid sealant.

Based on all of the above, you can be sure that the liquid sealant is undoubtedly worth using to eliminate leaks in heating system... Even though its price "bites". However, it should be understood that hidden installation heating pipes are not only convenience, but also a certain risk, for which sometimes you have to pay.