How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video

How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video For connections of pipes water supply, gas pipeline, heating system and for other similar purposes, thread sealant is used. Its main task is to make these connections as strong as possible, preventing leaks.

There are several types of such material, when buying it is recommended to familiarize yourself with the technical characteristics of the product in order to understand which one will suit you better.

Sealant for threaded connections. General


Large scale repairs include quality assurance checks at all levels.

It often happens that the owners of houses and apartments do not take into account how tightly connected the pipes of all vital systems. Such negligence can lead to many unpleasant surprises in the future. If a water leak, even a minimal one, can be resolved in time upon detection, then a gas leak is life-threatening.

Laying pipes near expensive household appliances will entail additional expenses if, during a water leak, it breaks down. The old-fashioned ways of solving the leakage problem include thread, tow, plasticine, but in the era of high technologies, to put it mildly, it is strange to use such ineffective materials.

The thread sealant is perfect for such tasks.

Types of thread sealants

  • How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video fum tape
  • teflon thread
  • anaerobic gel sealant for threaded connections.


With fum-tape, everything is clear from the name. It is sold in spools in the form of a thin tape that is wound tightly around the threads of the pipes. Teflon thread is used for tight connection of pipes made of various materials for ventilation systems, heat exchange, drainage, refrigeration units, etc.

Often used in medical institutions, food industry, etc., where there are high requirements for sanitary standards.

Anaerobic sealant for threaded connections

It has gained particular popularity in recent times, and all thanks to the best level of pipe fastening to each other, completely sealing the thread. When applied correctly, this material can withstand a pressure of about fifty atmospheres, as well as decent vibration loads. Anaerobic sealant is considered to be a good solution for domestic and professional use.

Details of Anaerobic Sealants


A distinctive feature of Anaerobic Sealant Gel in the fact that the process of its solidification occurs when the joint work is completed, and the access of air to the material has stopped.

How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video This ability of the sealant guarantees a super-strong connection that cannot be destroyed even by mechanical action of brute force.It is possible to dismantle the gel only with direct exposure to a super high temperature; in this case, a construction hair dryer is useful. In this regard, the conclusion suggests itself, no temperature jumps, and even more so hot water in pipes, are not capable of destructively affecting the anaerobic sealant.

The life of anaerobic thread sealant is 5 years, subject to strict adherence to application instructions.

Otherwise, this period is reduced significantly, and a leak can occur after a year of pipe operation. In any case, this is still more than obsolete sealing materials can offer.

The price of anaerobic sealant ranges from 1 to 2 thousand rubles per tube of 50 ml. Experts recommend not to skimp on the material, because in the event of a leak or a breakdown of the system, the repair will result in a larger amount. The sealant has a very economical consumption, and a volume of 50 ml is enough for manipulating the plumbing in the apartment.

Types of anaerobic sealants

The types are subdivided based on composition:

  • How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video Oligomeric.
  • Polymeric.
  • Acrylic.

They have excellent qualities of a tight connection, are not subject to high pressure, temperature extremes and mechanical stress. Differences will be found only by specialists in the chemical industry; for builders, the technical characteristics of the sealant are important.

According to the degree of adhesion, anaerobic sealants are divided into:

  • Low level composition;
  • Medium level composition;
  • Composition with a high level.

Low retention sealants are used for fastening small diameter pipes or temporary joints. Such a composition does not withstand vibrational vibrations, and is also unwound using improvised tools.


Sealant with a low joint level can be used for long-term use, taking into account light pipe loads.

Gel sealant for threaded connections and paste with an average level of fixation, used for domestic use in work with systems of gas pipeline, drainage, heating. Their composition does not affect the quality of drinking water in any way. A remarkable feature of these materials is the reliable fixation of pipes, and dismantling is possible only with the help of special equipment. The sealant is able to withstand pressure loads, temperature fluctuations, and pipe vibration.


For domestic use, a medium hold sealant is sufficient, no more is needed. Since sealants with strong fixation hold the pipes tightly, and it is not possible to separate them in the future.

Sealants with a high level of connection are mainly used in industrial enterprises: factories, factories, in the installation of an urban drainage network.Their price is very high, sealants require certain skills in handling them, due to the fact that the work must be carried out quickly without delay, the movements must be honed. To dismantle this type of connection, the pipes must be cut.

Anaerobic thread sealant for pipes, also divided into types depending on the level of viscosity of the material. Frequent and shallow threads provide for the use of a sealant that is able to fill the joint space as much as possible. At the same time, the maximum permissible pipe diameter is 40 mm.

Color classification of hermetic thread glue

Classification of anaerobic sealant by color, helps to immediately determine for what purpose it is used.

Thread Sealant Blue

The blue color of the material indicates that it is suitable for metal pipes.

The connection takes place in such a way that its resistance to various influences from the outside remains at a high level. This sealant began to be used in everyday life, relatively recently. Previously, it was used in industries (defense industry, aviation, space industry). The diameter of the pipes should not exceed 20 mm, and the connection can be dismantled without special tools.

Thread sealant red

How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video Red sealants are used to seal old worn threads, as well as ferrous metal pipe connections.

Their setting time is shorter than that of other sealants, while the quality of the joint does not suffer. The material is resistant to temperature fluctuations and increased pressure. Used to work with pipes with a diameter of no more than 30 mm. To dismantle the joints, heating tools are used. In repair work, the excess sealant can not be removed, but applied over the existing layer.

Green thread sealant

Green sealant has a low level of joint strength, therefore it is often used for temporary fastening of metal and plastic pipes. Dismantling does not require much effort; this can be done by twisting. Also, it should be noted that green sealant does not have the excellent vibration and high pressure resistance characteristics of blue. The maximum allowable pipe diameter for connection is 3.81 cm, and the thread must be intact.

Thread Sealant Applications

Anaerobic thread sealant was invented back in the 1950s in the United States. At first, the area of ​​their application was limited only to industrial enterprises. Then, gradually they began to be used in the construction industry.

At first, sealants were not used to connect water supply pipes, since there was an erroneous, unsubstantiated opinion that the composition of the material could have a detrimental effect on water quality. Later, research proved that all of this is empty fiction.

Areas of use of glue thread sealant

Water supply.

Sealant for threaded water pipe connection is used in work with pipes in apartments and private houses. It can withstand water pressure, vibration and temperature fluctuations. The color of the sealant is blue.


How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video Threaded plumbing sealant is used for pipes in which it is necessary to create a reliable connection. Water is supplied to the plumbing using pipes, the connection of which must also be made tight.


Sealant for heating threaded joints must be resistant to high temperatures and their fluctuations, antifreezes and chemical components in the heating system. For cast iron radiators, a red sealant is used.

Gas pipeline.

Anaerobic thread sealant is best suited for this purpose. It has excellent qualities for a reliable connection of everything related to gas. The color of the sealant is blue.

Advantages of thread sealants

  • Heat resistance.

    The range of permissible temperatures is 200 ° C + 300 ° C.

  • Connection is reliable.
  • Economical consumption.
  • Resistance to chemical compounds.
  • Does not dissolve when exposed to water.

  • Versatility.
  • Resistant to high water pressure.

Cons of thread sealants

  • Dependence with temperatures. Pour point +15 - 25 ° С. At low temperatures, the sealant hardens longer and worse.

  • The need to clean the surface. Cleaning, degreasing, drying - these are the three main rules for the reliability of adhesion of surfaces.
  • Difficult dismantling. Only with a green sealant there are no problems, for the rest it is necessary to use tools.

How to use gel sealant for threaded joints?

Before applying the sealant, the surface to be treated must be thoroughly cleaned of rust and other contaminants.

It is not necessary to remove the old sealant. Clean the new pipe with a wire brush to increase adhesion.

How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video In order to degrease the surface, use any composition, for example, white spirit. Degreasing work should be done scrupulously, otherwise setting will not occur. A special activator is applied to plastic pipes at the joints.

Before opening, the tube with the sealant must be shaken and only then opened. The compound must be applied in a thick layer around the entire perimeter of the thread. For better tightness, sealant is applied on both sides of the joint. This way you will achieve the best possible result.

After the adhesive thread sealant has been applied, tighten the parts thoroughly.

No additional tools are required, everything can be done manually. Sealant protruding from the edges can be wiped off with a napkin.

You can check the joint for tightness after 15 - 25 minutes, by creating a low pressure of gas or water, 10-15 atmospheres is enough. letting in water or gas.If there are no problems, wait for the final solidification.


Complete setting of the anaerobic sealant occurs after 24 hours. Re-testing for strength is carried out with a pressure of 40 atmospheres. If there is a leak, everything must be disconnected and re-processed.

Overview of manufacturers of anaerobic sealants

The following brands have collected the most positive reviews from users:

  1. How to use a strong hold thread sealant: types - plumbing, for bolts, heating, gas pipeline + Video Sealant for threaded connections Loctite made in China.

    Possesses universal qualities, but requires cap care.

  2. Sealant for threaded connections Sealup made in Italy. It has excellent quality and is very easy to use. Equipped with a guarantee seal that allows you to assess the tightness of the tube.
  3. Thread sealant Abro allows you to work with the compound at sub-zero temperatures within - 20 ° C.

  4. Sealant Mannol has a pungent odor that does not allow working in an enclosed space, but the shelf life is pleasing, it is quite long.
  5. Sealant Wurth made in Germany, one of the highest quality materials on the market, but has a high price.
  6. Sealant Tangit Uni Lock made in Belarus, suitable for metal and plastic.
  7. Thread Sealant Siseal is especially popular, available in 100g tube.

Recommendations from specialists

If the pipe is fragile and fragile, do not try to unscrew it, use heating with a hairdryer.

Temperature not less than 170 ° С. If possible, do not use sealants with a low level of adhesion, because parsing the pipes takes a lot of time and effort. For temporary fastening, use tape and thread sealant or fum tape.