Polyurethane sealant types of application consumption best manufacturers

Application instructions

Since the constituent part of the raw material is due to the use of only one main component, and there are no different kinds of solvents in its structure, the release of the sealant is carried out in foil tubes, metal cartridges and in buckets. The mixture is applied using special tools called pistols.

There are three types of spray guns on sale.

• Mechanical pistols. They are made for private construction work, as they can handle only a small amount of tasks.
• Pneumatic guns. The tool is aimed at medium-sized jobs and is often purchased by professional builders.
• The gun is equipped with a rechargeable battery. Such a tool is used in the construction of high-rise buildings.

Before work, you need to put on a special nozzle on the selected gun, cut the seam to the desired length. In order for the sealant to bond the surfaces efficiently, care should be taken that the size of the diameter on the mixture is twice the depth of the seam itself, on which the mixture will be applied.

Before using the sealant, you will need to carry out preparatory measures: you need to remove all dust deposits, paint and various oil materials from the treated surface. Masters advise against using the sealant outdoors, when it is raining outside and during other atmospheric precipitation. If there is rust on the base, it must be removed with a grinder or sandpaper. Thanks to such actions, it is possible to increase the adhesion rates several times.

Interpanel or interblock seams must be insulated in advance. The action can be performed using construction foam for installation or use expanded polyethylene. It is recommended to apply the sealant over the insulation material. To do this, you need to use hand-operated pneumatic guns or spatulas. The mixture should be spread over the surface in a measured manner. No voids or breaks are allowed.

To level the applied material, you will need steel or timber joining. The base should take on an L-shape. The sealant dries quite quickly, but three hours after application it turns into a mixture that is resistant to negative temperatures, moisture, and the influence of atmospheric precipitation. Until then, the sealant should not be exposed to such irritants.

COVERS FOR SEALING UNDERGROUND PIPES

Foamglas PC PITTWRAP S.S. 24 "+ 4" (KIT) (Belgium)

Description: Self-adhesive coating - PITTWRAP SELF-SEALING casing consists of a special bitumen resin reinforced with glass cloth, coated with aluminized Mylar (PET) film and protective paper. PITTWRAP SELF-SEALING is a self-adhesive non-metallic sheet for protecting underground FOAMGLAS insulation systems. The casing is secured by simple manual pressure, without the use of heaters or burners. The PITTWRAP SELF-SEALING casing can be applied to insulation parts in the factory as well.

Packing: Roll + 0.60x15.24x0.1x15.24 m / in a box

Foamglas PC PITTWRAP B100 (Belgium)

Description: The PITTWRAP B100 jacketing casing is a self-adhesive casing, alumobutyl laminate, used to protect ground FOAMGLAS thermal insulation systems of branch pipes under a protective finishing casing. The protective cover must be installed over the PITTWRAP B100 to protect it from UV rays. The jacket is hand-applied without the use of a torch or heater. PITTWRAP B100 jacketing consists of 1.1 mm high tack butyl adhesive with 25 micron aluminum foil laminated to the top and bottom with 12 micron polyester film to provide a high level of resistance and protection (tear and puncture resistance ). Polyester layers also protect the aluminum surface from corrosion.

Packing: Roll 1m * 150m (15 sq.m.)

Properties

Sealants based on polyurethane differ in that they have excellent strength characteristics and have a long service life.They are not afraid of unfavorable environmental factors. They perform well even under water, so such mixtures can be used in a variety of areas.

Polyurethane sealants adhere seamlessly to most known materials, for example:

• with brickwork;
• natural stone;
• concrete;
• ceramics;
• glass;
• tree.

When open cavities are filled with such a compound, it forms a very neat rubber-like layer. He is absolutely not afraid of negative external factors.

It is worth paying attention to the fact that a high-quality polyurethane sealant adheres 100% to certain bases, regardless of their texture

Once dry, the sealant can be painted over. From this, he will not lose his useful qualities and will not undergo deformation.

Polyurethane sealant is a fairly economical material, especially when compared with different analogues. One package may well be enough to process a large area. For example, if you need to fill a joint that is 11 m long, 5 mm deep and 10 mm wide, you only need 0.5 liters of sealant (or 2 cartridges of 0.3 liters).

As for the average material consumption with a joint width of 10 mm and a depth of 10 mm, it will amount to 1 tube (600 ml) per 6.2 linear meters.

Modern polyurethane sealants are characterized by a short drying time. However, we must not forget that this parameter is influenced by the density of the applied layer.

The polyurethane-based compound adheres seamlessly to other sealants. Due to this property, in case of damage to the seal, it is easy to repair the affected area. As a result, the improvements will be almost invisible.

Polyurethane sealants are available in clear and colored forms. In stores, you can find not only simple whites, but also gray, black, red, yellow, blue, green and other colorful compositions.

Polyurethane sealant: instructions for use

All bases must be properly prepared before sealing. For this, the working surfaces are cleaned of contaminants. Remove all dust deposits, oil stains and drips, old paint and other paints and varnishes. Rust is removed with sandpaper, sandblasting or a grinder. Interpanel, interblock seams are first insulated. For this purpose, they purchase polyurethane foam or expanded polyethylene.

They work with the sealant outdoors only in clear, dry weather, when there is no rain or other precipitation. It is advisable to use the product at positive temperatures, although some of them can be applied at –5… –10 degrees. Polyurethane sealant is applied over insulation materials without any special treatment. When it comes to deformable panel seams, it is better to choose a two-component composition that can withstand a shift of 10-12% or more.

To work with polyurethane sealants, the following types of guns are used:

1. Mechanical. Assume manual trigger pull and adjustment of the thickness and length of the seam. Suitable for a small amount of work, household needs.
2. Pneumatic. Use the force of the movement of the air flow. Used by professionals, ideal for medium-sized jobs.
3. Rechargeable. Well suited for sealing interpanel joints in multi-storey buildings, for large-scale actions.

Consumption of sealants

Polyurethane products are very cost effective. To calculate the amount of material required, you need to know the depth of the seam and its width. When these numbers are multiplied, the amount of sealant in milliliters per 1 running meter of a square or rectangular seam will be obtained. If you plan to make a triangular seam, the figure should be divided in half.

Distinctive features of sealants are the following qualities:

Increased elasticity of the composition. This property contributes to the reliable adhesion of the polymer to materials with different properties.Under various mechanical influences to which the joints with the sealant applied to them are subjected, they are able to remain sealed and retain their functions. Good adhesion to most types of building materials. The composition is well fixed on concrete, wooden surfaces, metal. In addition, the sealant will adhere to a previously applied similar composition. Increased resistance of the composition to wear. No problems with high ambient humidity and prolonged exposure to direct sunlight. This distinguishes the polyurethane sealant from other binders. Sufficiently long-term fixation of the materials being bonded. Achieved thanks to the unique formula of the binder composition. Polyurethane sealant copes well with temperature changes typical for the climatic conditions of our country. Work is possible both in the Far North and in the southernmost regions of our country, since the composition does not lose its characteristics at temperatures from -60 * C to 40 * C. In the process of applying to the surface of the material, smudges and stains of the sealant are excluded. This greatly facilitates the work of the installer and reduces the complexity of the operation. The rule is observed with a thickness of the applied layer up to 10 mm. In addition, shrinkage of the sealant after curing is minimal. The speed of polymerization of the composition to the end point. Variety of color palette of materials. The manufacturer offers almost the entire basic color palette for every customer's taste. Environmental friendliness of the sealant. With prolonged exposure to ultraviolet radiation and high temperatures, the sealant does not emit hazardous and toxic substances into the environment

Types of sealants

One-component formulations are quite popular due to their ease of use. The chemical formula of the sealant is represented by only one component - a polyurethane prepolymer. One-component polyurethane sealant has good adhesion to various materials, it also retains its properties when applied to glass, ceramic surfaces, the surface of which has a low adhesion coefficient or roughness.

Installers praise these formulations, since they do not require mixing several components for their use. The sealing compound is used for repairs and new construction in the following types of work:

• When sealing joints and sealing joints in structures.
• Sealing joints of elements of roofing.
• Elimination of gaps in car body elements and glass.

Separately, it should be said about glass sealant, which is used both when installing glass in a car, and when installing various fiberglass structures in the interior of a car. It is especially important when gluing glass or plastic elements to metal, which is exposed to various adverse environmental factors.

There are no perfect materials, so this composition is not without its drawbacks. One of these disadvantages is the inability to work at temperatures below -10 * C. And all because of the low moisture content in the ambient air, which is why polymerization is poor. The material loses the required elasticity and hardness. In addition, the composition becomes too viscous, which makes it difficult to apply it to cracks and seams.

Advantages of polyurethane based adhesive sealant

• This substance consists of polyester compounds and hardeners. After being applied to the adhesive surface and in contact with air, it hardens, after which it forms a durable surface. Often, these adhesives require additional moisture, so the surface is sprayed with water. After an hour, the sealant forms a strong surface film, the process of complete solidification takes about a day.If the temperature drops below 23 degrees, the curing time increases, respectively, as the temperature rises, it decreases. The sealant is convenient to use, adheres well to brick, concrete, stone, metal and wooden surfaces. It is quite resistant to ultraviolet light and atmospheric precipitation. Most often, such adhesives are used in individual construction and household use.

• Two-component

  This sealant also consists of polyester resins and hardeners, which are mixed before starting work. The mixing quality of the sealant fully affects the properties of the adhesive, as well as the time of its hardening. Usually, the compositions are mixed at room temperature, since low temperatures increase the viscosity of the substance, which greatly complicates the qualitative mixing of the composition. The sealant has good adhesion and water resistance. This tool goes well with all kinds of surfaces, it is often used when gluing sheets of metal and glass.

Foam glass adhesives FOAMGLAS

Peculiarities

Not allowed:

• applying a sealant to a surface with free moisture;
• dilution of the sealant;
• use of sealant in areas of prolonged contact with organic solvents and oils, with highly concentrated acids and alkalis;

• it is not allowed to use sealant on bases formed by bitumen and bitumen-polymer materials, including roll ones.

  

  

  

  

  

  

  

  

  

  

Execution of works

Before applying IZHORA "Winter" polyurethane sealant, it is recommended to seal the seam or joint cavity with a cord made of foamed polyethylene. Apply IZHORA "Winter" polyurethane sealant with a spatula with a layer of at least 3 mm in one pass.
The minimum permissible joint width between panels is 10 mm.
The optimum ratio of the seam depth to its width is 1: 3.
The time of complete polymerization of the IZHORA "Winter" polyurethane sealant depends on the temperature and humidity of the outside air and is on average:
• 48 hours at + 15 ° C;
• 7 days at –20 ° C.

Package

Calculator

We draw your attention to the fact that the obtained value is an approximate

Certificates

1. Certificate of conformity of the GOST R certification system No. ROSS RU.AG91.N02321 for polyurethane sealant IZHORA and polyurethane sealant IZHORA "Winter" (valid from 21.04.2017 to 20.04.2020)
2. Expert opinion based on the results of sanitary and epidemiological examination No. 01.05.P.10544.03.14 for polyurethane sealant IZHORA (valid from 28.03.2014)
3. Certificate of state registration of the Customs Union No.RU.78.01.05.008.Е.000234.04.14 for polyurethane sealant IZHORA (valid from 01.04.2014)
4. Conclusion of OS "VNIIGScertification" on the optional certification of materials LAKHTA, SLAVYANKA and IZHORA
5. Conclusion on the optional certification of materials LAKHTA, SLAVYANKA and IZHORA in the Certification System in the field of fire safety

Composition and properties

Polyurethane adhesives are based on urethane rubbers of different quality and production, differing from each other:

• properties that appear after final polymerization;
• the structure of the adhesive layer, which can be linear or mesh;
• the degree of solubility in organic solvents.

The main raw materials are most often produced by foreign manufacturers (domestic accounts for only 10%). The composition of polyurethane adhesives also includes additional components (more than 10-15 items), which determine the final properties and quality of the product. Depending on the specific set and the amount of these substances, the viscosity, adhesion of the glue, the speed of its hardening, the dependence of the indicators on humidity and temperature, and the shelf life may vary. Among the additives to polyurethane, the following are worth mentioning:

• zinc oxide, titanium dioxide, carbon black, Portland cement;
• hydroxyls and isocyanates;
• acetone, alcohols and organic solvents;
• artificial and aromatic resins, surfactants;
• water emulsions, alkaline solutions of salts, acids;
• stabilizers and crystallization accelerators.

A different shade of the finished mixture is given by dyes, pigments, usually made on the basis of metal oxides. For woodwork, buy amber or brown adhesives, for metal - gray or black. There are also white, yellow and colored compounds on sale. By consistency, they are liquid, pasty, gel.

Due to the different composition, the properties of the adhesives vary over a wide range. For example, the consumption for a uniform continuous application to the surface can be 500-1000 g / sq. m, and with a point - about 100-150 g.

The finished coating can be used at temperatures of -40 ... + 120 degrees. The best adhesion is observed when bonding porous, rough surfaces, although smooth materials are also subject to bonding.

Other features of polyurethane compounds:

Types and physical properties of sealants

Let's consider in more detail what sealants are offered on the market today and what their properties are.

Acrylic sealants

All acrylic-based sealants have the following properties:

• Virtually do not change their size after drying. The seams treated with them should not be subjected to tensile and compressive effects;
• The thermal expansion of the treated joints should not exceed 8-10% (the optimum quality of the joint is observed at a constant temperature);
• Odorless, environmentally friendly;
• After drying, the seam can be painted (with water-based or oil paints).

Sealing compounds based on acrylic are divided into non-moisture-resistant and moisture-resistant. The first type can only be used for indoor work on dry walls made of concrete, brick, plasterboard, wood, skirting boards and furniture.

Moisture-resistant acrylic sealant withstands temperature extremes better, therefore it can be used in the bathroom and in the kitchen (without constant contact with water). They cannot handle a wet seam. The adhesive qualities of moisture-resistant acrylic are higher, so it can be used not only on monolithic surfaces, but also on porous ones.

This composition goes well with foam concrete, tiles, wood, plastic and ceramics. It is not recommended to use it outdoors.

Acrylic silicone sealants

The main disadvantage of acrylic is that it was possible to overcome its low water resistance by adding silicone to it. The combined composition is not afraid of rain and temperature fluctuations, therefore it can be used for outdoor work. The resistance to deformation of acrylic silicone is higher. The seam is elastic and tight.

With this composition, you can close up small leaks in doorways, seams in window frames, plaster, tiles, siding and glass. Once dry, the joint can be painted with oil or latex paint.

Silicone sealants

The most common type. Silicone is not sensitive to water and is very elastic (it can change its size without destruction by 2-3 times). The disadvantage of seams treated with colorless silicone is the impossibility of staining and restoration.

Additives are introduced into the composition of this sealant, giving it the necessary qualities:

• antiseptic (can be used in wet rooms);
• heat-resistant (sealing of hot joints);
• neutral (do not have a chemical effect on materials);
• acidic (designed for sealing plastic, it cannot be applied to metal).

Polyurethane

It is a versatile sealant. It is durable and elastic at the same time. Equally well suited for sealing outdoor and indoor seams. Reliably insulates joints in hard materials: metal, concrete, plastic, wood and their combinations. It is not afraid of moisture, high temperatures and aggressive environments. It can be used for pipes, roofing, windows and doors.

Polyurethane-silicone

A fairly new universal material. Siliconized polyurethane (MS polymer) creates a strong, chemically inert, elastic and durable joint that is easy to paint and repair.

It has high adhesion (adhesion) to the surface. For this quality, it is often called an adhesive sealant. The heat resistance of such a material is in the range from -40 to + 90C.

Bituminous sealants

A classic material designed exclusively for outdoor use. They are based on a combination of bitumen and rubber.

Peculiarities

Until the middle of the last century, various joints were sealed with rubber or cork. At that time, these materials were quite expensive and people were looking for more affordable alternatives.

The first experiments on the synthesis of polyamides were started in the USA, but German scientists, who also took part in new developments, achieved success in this matter. This is how the materials popular today - polyurethanes - appeared.

Most buyers opt for polyurethane formulations, since they have many positive qualities.

Let's get acquainted with some of them:

• The polyurethane sealant is highly elastic. It often reaches 100%. It is very easy to work with such a composition.
• Such mixtures boast excellent adhesion to many types of materials. They fit seamlessly on concrete, brick, metal, wood and even glass. In addition, good self-adhesion is inherent in polyurethane-based sealants.
• Such compositions are durable. They are not afraid of high levels of humidity or aggressive UV rays. Not every binding material can boast of such characteristics.

• Polyurethane sealant can be safely chosen also because it perfectly copes with its main task. This building mixture guarantees excellent sealing and waterproofing of the necessary parts for quite a long time.
• Also, temperature drops are not terrible for polyurethane sealants. It easily tolerates exposure to subzero temperatures down to -60 degrees.
• A similar composition can be used at any time of the year. For example, it could be winter with cold ambient air. In such conditions, the sealant will still easily fall on one or another base, so repair work will not have to be postponed to a warmer period.

• The polyurethane sealant does not drip. Of course, this property takes place in cases where the applied layer does not exceed 1 cm in thickness.
• This composition gives minimal shrinkage after polymerization is complete.
• Polyurethane sealant is also convenient because it dries up in the shortest possible time and hardens rather quickly.
• The polyurethane-based sealant can be colored or colorless.

• If the air contains moisture, then under its action, such a sealant will polymerize.
• Polyurethane compounds are not susceptible to rust.
• Such materials are not afraid of mechanical damage.

It is worth noting that the polyurethane-based sealant is similar in many characteristics to polyurethane foam during its drying process, since it polymerizes in the shortest possible time and becomes hard.

In the composition of modern sealants there is such a component as polyurethane with a one-component structure. Also in stores you can find two-component options that boast improved sealing properties.

As you can see, such building mixtures have a lot of advantages. However, polyurethane sealants have their own weaknesses.

You should also familiarize yourself with them if you have to work with these materials:

• Although polyurethane sealants have excellent adhesion properties, in some cases they are not enough. A similar problem can be encountered if you seal structures made of certain types of plastics.
• According to experts and manufacturers, polyurethane compounds cannot be laid on substrates with a moisture level exceeding 10%.In this case, they should be "reinforced" with special primers, otherwise you simply will not be able to achieve sufficient adhesion.
• It was indicated above that temperature drops are not terrible for polyurethane compositions. However, it should be borne in mind that prolonged exposure to temperatures of 120 degrees can lead to the fact that the sealant will lose its performance.
• Few people know, but disposal of polymerized sealant is an expensive and very difficult operation.