Types of roofing sealants. Bitumen sealant. He's a roofer. Characteristics, purpose How to use bitumen sealant
The roof is one of the most important elements design of the entire house, since the service life of the roof, convenience and comfort of the residents will depend on the quality of its implementation. Therefore, in roofing work, only the most durable building materials are used and all requirements are met.
Repairing a roof does not always involve replacing the material from which it is made. Quite often it is necessary to efficiently and effectively seal cracks and crevices that allow moisture to enter the house. For this, as a rule, they use bitumen sealants. The main component of this material is bitumen, which is insoluble in water and exhibits high level resistance to a variety of external negative factors. For this reason, bitumen sealants are most often used on wet surfaces.
Life time seam bitumen sealant averages from 15 to 20 years. Among the main advantages of this material are such as excellent adhesion (adhesion) to the most different surfaces And building materials, elasticity, high level of resistance to moisture, weather conditions, effective protection surfaces from rust, which can quickly destroy the roof.
The use of bitumen (roofing) sealants is relevant not only for roofing. The material is well suited for compaction, sealing, filling cracks in foundations, plinths, drainage system and other designs. But in order to bitumen sealant really showed his all positive properties and provided an excellent result, you need to remember some operating rules.
Before applying the sealant, the surface must be thoroughly cleaned and degreased using a solvent. It is advisable to apply sealant to cracks and crevices only at positive temperatures, in the range from +5 to +30 degrees Celsius. The sealant is usually applied in several thin layers, which ensures faster and better drying.
In order for the bium sealant to lay securely and firmly on the base of the roof, its layer should be a maximum of 0.5 to 1 millimeter. Wherein average consumption mastic on square meter on average should be from 0.8 to 1.8 kilograms. Setting time of bitumen sealant is less than half an hour, for complete drying, as a rule, it takes from 2 to 4 hours. Although, there are materials that dry completely only after at least two weeks. If bitumen sealant is used on a porous base (cement, cement-sand), then the roof surface must be primed using a bitumen primer, then wait for it to dry completely and only then begin the main sealing work.
Thanks to the use of bitumen mastic, it is possible to obtain reliable monolithic roof, even the minimal risk of leakage is eliminated. This makes it possible to significantly increase physical and mechanical properties roofs, durability without the need for major repairs, reliability and other important properties.
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The compound, known as bitumen sealant, is made from bitumen, which has excellent water-repellent properties. It is thanks to this quality real stuff Widely used for roof sealing with 100% quality guarantee. The product has a natural black color, but in some cases pigments are added, for example, aluminum powder, which silvers the substance and increases its service life.
Bitumen roofing sealant is a one-component material based on modified bitumen. The binder of the compound is bitumen, but since it is modified by chemical additives, this composition is more resistant to natural atmospheric loads. You can remove the product from the surface using petroleum solvents, such as white spirit.
Roof sealing compounds
Bitumen-rubber sealants for roofing work
To seal joints when installing a soft roof (roofing felt, tiles, etc.), materials with increased plasticity are required, which can confidently include roofing sealant “TITANIUM”, “OREOL-1” or PENOSIL. Thanks to rubber additives, the substance has not only increased elasticity, but also excellent adhesion to surfaces with varying degrees of humidity, for example, after rain.
TITAN or PENOSIL paste, like any other compound of this type, consists of bitumen, rubber, artificial fibers and an organic solvent. This composition is designed for operation at constant air temperatures from -20ᵒC to +70ᵒC. If the air temperature in your region often drops below -20ᵒC, then it is better to use other materials for sealing joints.
Using sealant to seal gaps
Hardening of bitumen-rubber sealant occurs according to the principle of physical drying, like bitumen; the material gains the required hardness after evaporation of the organic solvent. The thickness of the layer when sealing can vary greatly, so manufacturers determine the estimated readiness period after 12-114 days with a dry residue of 85-87%.
Sealants of this type are used both during the installation of roofing material and some time after it, as well as for minor repairs(sealing cracks or replacing sections of coating). Please note that such compounds are not used for rigid connections such as ridges, gutters, roof breaks, and so on.
Bitumen-polymer sealants and their features
TechnoNikol No. 42 – bitumen-polymer compound for roofing works
Most often for repairing defects on roofs, in particular roofing materials, reinforced concrete floors and junction points, bitumen-polymer sealants such as “TechnoNikol No. 42” are used. This is a one-component material that has acquired completely new positive qualities due to the addition of polymers and mineral components to the petroleum product.
Basic specifications for TechnoNikol No. 42
If bitumen-rubber sealant can be used in wet weather, that is, to seal wet surfaces, then an identical material with polymer additives needs no moisture. In addition, TechnoNIKOL and other similar products are applied using a hot method - softening here occurs at a temperature not lower than 160ᵒC. This technique ensures powerful adhesion, which serves as a 100% guarantee of sealing the treated area.
Bitumen-polymer primer AT140
In addition to materials that require heating, there are also polymer primers for cold application. These mastics are used to treat horizontal and vertical seams, small cracks, put roofing felt on them, and also make an autonomous waterproofing coating. But, nevertheless, in most cases, products of this type are used for sealing joints (cracks).
List of positive qualities of bitumen compositions
Bitumen-rubber mastic for roofing “TITAN”
All bitumen-rubber pastes, for example, the TITAN roofing sealant that you see in the top photo, are different:
- guaranteed adhesion with all kinds of roofing materials and rough substrates different types;
- setting speed, which the same roofing sealant “TITAN” has. This process occurs much faster compared to conventional bitumen;
- resistance to influence ultraviolet radiation;
- thixotropy - it prevents the formation of cracks when the paste mass dries out;
- biological stability - when humidity is present, fungal mold does not form and organogenic destruction does not occur;
- diversity - grades are produced that are resistant to petroleum products and chemical solvents;
- long service life - up to 15-20 years.
Attention! Rubber-based bitumen roofing sealant is not suitable for high temperatures and resistance to open fire. The hottest environment in which a given compound will retain its beneficial properties physical properties, this is the natural heating of the air and roofing material from exposure to sunlight.
The use of bitumen-based sealants in roofing work
There are two ways to apply bitumen sealants to the roof - cold and hot. Since the latter requires special equipment in the form of burners, it is gradually becoming obsolete. Modern statistics indicate that the majority construction organizations prefer cold sealing of the roof.
Waterproofing tapes and gels - eliminating leaks
The use of bitumen self-adhesive waterproofing tapes is very convenient when sealing joints of roofing materials, cracks and holes (from fasteners or breaks). But this method of waterproofing requires a clean and dry surface. This means that before installing the tape, the area to be treated is wiped with a brush or cloth, and, if necessary, even washed with petroleum or chemical solvents - this provides conditions for creating adhesion.
Using self-adhesive waterproofing tape
On large areas, for example, on a joining seam roofing sheets, as in the photo above, it is best to glue the tape together so that it describes the surface relief. For the tightest connection to the roofing material, you should use a narrow roller - the tape simply rolls out over the surface and there are no air bubbles left under it.
Unlike bitumen self-adhesive tapes, compounds such as TITANIUM can be used in any weather, that is, water is not an obstacle to repairing damage. But here one should take into account the fact that very good adhesion of the material can develop into cohesion. Generally, this can happen on a surface where there is a lot of rust or looseness paintwork.
Compound "TITAN" can be used even under water
In addition to roofing materials, elastic sealants are used to seal damage to ventilation pipes and chimneys. Often such communications form hard to reach places(joints and turns) which can be reached using the spout of the tube (cartridge) installed in the gun.
Using mastics for major repairs
For large areas or complete renovation There is no way to use roofing tape or gel - it will be too expensive and inconvenient. In such situations, you can use to seal the roof. bitumen mastics cold application, allowing to cover large areas. Most of them can be spread both dry and wet. wet surface, but, nevertheless, in any case, it is necessary to remove dirt, debris and old coating that has fallen away from the base.
After cleaning the roof, the mastic is applied with a spatula and/or brush and thoroughly spread over the surface in an even layer. The area to be treated should not be very large, since it still needs to be sealed with fiberglass.
Sealing waterproofing with fiberglass
After applying the first layer, fiberglass fabric is immediately covered over it for compaction, which is then pressed to the surface with your hands or a wide spatula (depending on the topography of the roof). After this, another layer of mastic is applied over the fiberglass and as a result (after drying) a sealed roof is obtained that is resistant to precipitation and temperature changes. This method can also repair minor damage.
Hot method of applying roof sealing
Melting resin over an open fire
At home they still continue to use hot method applying bitumen - ordinary resin is chopped into pieces and melted in a bucket over a fire. During the melting process (sometimes upon completion), diesel fuel or kerosene is added to the liquid mass at the rate of 0.5-0.7 liters per bucket to give the substance coverage. The method of applying the melted substance is identical to applying mastic, but the quality of the waterproofing coating, of course, is worse.
Bituminous tape is also applied using the hot method - it is heated directly at the place of application, that is, on the roof. In the top photo you can see how a hole in the slate is being sealed - part of the wave has been knocked out and the hole is at least 10 cm wide. But if, when sealing with ordinary bitumen or mastic, you have to substitute a piece of slate, then this will not be required for the tape:
- Heat the sheet around the hole on one side, as well as the edge of the tape, so that it can be glued to the surface.
- Heat the TechnoNikol cloth and, with a slight stretch, close the broken area with it
The waterproofing is 100%, in addition, the patch made will not react critically to temperature changes.
However, the hot method requires a burner, which is very inconvenient for working on roofs, especially those with a sloping surface. Therefore, even at home, rubber roofing sealant that does not require heating is increasingly being used. But, be that as it may, all bitumen sealants with modifying additives are quite elastic and can easily withstand temperature deformation of joints.
Video: using bitumen sealant
Every building has a countless number of joints, especially in the roof area. It often turns out that a leak occurs in such places; water leaks from the street into the room. If this defect is not corrected in time, the roof may collapse completely. For such cases, all kinds of sealants are used, materials created on the basis of polymer products that serve to eliminate cracks and cracks in different places of the structure. In addition, they are used for sealing or joining seams.
It is very popular, which is used for repairs and roofing. Therefore, it is often called roofing sealant. In professional construction, this product is also called thiokol or polysulfide.
The main area of application of bitumen sealant
Bitumen sealant is used for the following purposes:
Sealing seams and joints during installation ventilation systems and air conditioners;
Installation and repair of roofing;
Sealing joints during soundproofing and thermal insulation works indoors;
Bitumen sealant is used to seal joints of roofing materials
Sealing skylights ny designs;
Connecting all kinds of polymer and bitumen coatings both with each other and with other working surfaces: metal, wood, concrete, etc.;
Characteristics of bitumen sealant
Bitumen sealant is a very durable material. It is insoluble in water and does not lose useful properties when exposed to temperatures, resistant to various atmospheric phenomena. The bitumen-based polymers that make up it provide excellent adhesion to different types of building materials, protecting against rust on load-bearing metal roof structures.
Bitumen sealant is easy to use and maintain. It dries very quickly (in 2 hours, in some cases up to 48 hours). In addition to roof repairs, such sealants are indispensable for strengthening the foundation, preventing water from entering the premises. They are viscous and do not emit toxic gases.
Instructions for using bitumen sealant
Like all building materials, bitumen sealant requires compliance with certain rules during its operation:
The working surface must be thoroughly cleaned of dirt, dust particles and grease;
If you apply the sealant in several layers, you can achieve a better effect;
Used only at positive temperatures;
The sealant layer should not be more than one millimeter;
How to choose bitumen sealant
Bitumen sealant
The main area of application of bitumen sealant || Characteristics of bitumen sealant || Instructions for using bitumen sealant
One of the most significant components of the entire housing system is the roof. After all, the practicality and comfort of residents depends on the quality of the roof. For this reason, only strong and reliable materials are used in roofing work, and all roofing conditions and requirements must comply with standards.
Restoring a roof does not always mean changing the material used; quite often it is necessary to efficiently and effectively close the cracks and cracks that cause dampness in the house. For this purpose they use bitumen sealants. Bitumen does not dissolve in water, and it is also very resistant to various types of negative conditions, which is why it is most often used on damp surfaces.
Work period bitumen sealant from fifteen to twenty years. The main characteristics of the material include: good connection with different surfaces and materials, moisture resistance, flexibility, surface protection against corrosion.
Before applying sealant to the surface, it must be thoroughly cleaned and degreased. In this case, a solvent must be used.
Bitumen sealant It is recommended to apply it to cracks and cracks only at temperatures above zero. It is advisable to do this at a temperature of +5-+30 degrees. In order to ensure faster drying and a high-quality result, it is recommended to lay the sealant in several balls.
Sealants can also be used for insulation works, and before applying it, the surface must be thoroughly cleaned and degreased.
How to choose bitumen sealant
Bitumen is the main component bitumen sealant, and is considered the highest quality material used for sealing.
Bitumen has an aluminum tint because it contains aluminum pigment.
Bitumen sealant characterized by the fact that it sets very quickly and can be used with almost all materials. It also protects iron structures from corrosion and rust. This material forms a strong, elastic plane and is not exposed to infrared and sunlight, as well as humidity.
Feature bitumen sealant is that it must be used immediately, and the surface should not be dried or prepared.
The main purpose of the sealant is to cover the roof, but it can be used for other purposes. For example, bitumen sealant is well suited for sealing cracks in stone, roofing concrete products, gluing waterproofing sheets, and eliminating leaks in sewer pipes.
Depending on the application, there are several types of bitumen sealant: acrylic and polyurethane.
- Acrylics are used for smoothing cracks, filling joints, smoothing seams in walls, floors and windows.
- Polyurethane sealant can work in quite low temperatures, they can be used to seal seams, insulate swimming pools, cold gardens, and double-glazed windows. Most the best option- is to use polyurethane sealant during roofing work: to seal the joints of roofing materials, eliminate leaks, and install waterproofing.
Different types of sealant have their own characteristics. If you use silicone sealants, you should know that they are resistant to snow and rain, the appearance of fungus and mold, and have big choice color range, but they cannot be used on wet surfaces and are not compatible with dyes.
Bitumen sealants are used with any materials, are very resistant to cold temperatures, and are used on wet and dry surfaces. Plus, they are affordable.
TechnoNIKOL is considered one of the largest manufacturers of roofing materials in Russia. The company's specialists have created completely the new kind bitumen shingles(Shinglas). TechnoNIKOL soft roofing is in demand in the low-rise construction market. ABOUT high quality The products produced are certified by a quality certificate, namely ISO 9001.
Currently construction market offers 4 main types roofing sealants.
This sealant has a number of characteristic features:
Disadvantages include poor resistance to high temperatures and the base color of the material is black.
Important! Due to the high level of toxicity, bitumen sealant cannot be used inside a residential area.
Rubber or silicone
This type of sealant is far from the last on the list of the highest quality:
Tape
Tape sealant is one of the most profitable and effective options for roofing:
- The basis of this material is butyl rubber.
- Sealant tapes have excellent resistance to low temperatures and ultraviolet radiation;
- They are easy to install due to their high adhesiveness: just lay the tape on the surface and press it down.
- Tape sealants are used for sealing between roofing sheets, chimneys and roofing, attaching thermal insulators, repairing cracks and rusty coatings.
Polyurethane
This sealant gives more possibilities due to its qualities:
Important! Not only is polyurethane sealant the best among other types today, it is also universal: it can work with metal structures, wooden and tile roofs.
For different types For roofs, there are corresponding sealants that, due to their advantages and disadvantages, may be ideal for one type of roof, but for another their effectiveness will be zero - and vice versa.
For metal roofing
There are a number of requirements for sealants for metal roofing:
- high elasticity;
- excellent adhesion to roofing materials;
- increased resistance to vibrations;
- low water absorption;
- resistance to precipitation.
Bitumen and polyurethane sealants cope well with these tasks. To seal the seams of a metal roof, the surface must first be degreased and cleaned, dried, and only then a sealant must be applied.
Silicone sealants cannot be used on metal roofs as they cause rust.
For corrugated roofing
Corrugated sheeting is similar in properties to metal tiles: their sealing is similar: it is carried out when the roof slopes up to 14 degrees, while protecting the horizontal and vertical joints of the corrugated sheets.
Sealing of corrugated board joints is carried out according to the following rules:
- when choosing a sealant, you should pay attention to polyurethane, acrylic and silicone samples - they give the best results, being excellent waterproofing agents;
- Before sealing, you need to check the joints - they must be dry and clean;
- the sealant is applied in an even layer of several millimeters, most conveniently - squeezed out or in the form of a polyurethane tape;
- it is used to process joints, bolt attachment points and other unreliable parts of the structure;
- The sealing process lasts 1-2 days and depends on the temperature and humidity.
After drying, the sealant becomes a durable rubber material that protects joints and connections from moisture.
Important! Sealing with the valley is carried out with a special profiled seal. Roofing sealant is used to process the seams of roof exit linings and the junction of the flooring itself with vertical walls.
For metal roofing
Despite its similarity to corrugated roofing, metal tiles have sealing features:
- for gaps up to 5 mm used silicone sealant or – temporary measure – aluminum butyl tapes;
- as an option for sealant - professional gaskets that repeat the geometry of the flooring;
- for a more reliable result, use ultraviolet-resistant silicone;
- sealant is applied to the joints of the roofing carpet, outlets (ventilation, antenna), and the edge of the apron chimney, its junction with the roofing sheets;
- with a roof slope of up to 14 degrees, the longitudinal and transverse joints of metal tile sheets are sealed.
Sealant for soft roofs
To date soft roof– one of the most popular types of coating. Its sealing occurs as follows:
- for flat roofs, liquid rubber is used - bitumen-polymer emulsion or mastic;
- For spot repairs, one-component is ideal liquid rubber– steam- and waterproof, elastic sealant;
- Coating rubber is suitable for repairing sealing and waterproofing of joints and seams;
- sealing mastic can be applied to surfaces of any humidity, has excellent adhesion to all materials and does not form swelling during operation.
Roof sealant "Titan"
Titanium is a one-component plastic sealant based on bitumen and rubber. It has a high degree of adhesion to wet and dry surfaces: aluminum, bitumen, metal tiles, roofing iron. Does not flow off the walls and has high stability to atmospheric phenomena.
This sealant is used for:
- sealing and updating seams and openings of all roofing surfaces;
- sealing leaks on roofs made of bitumen, tiles, sheet and corrugated iron;
- strengthening the fastening of roof windows and parts of the drain.
Two-component roofing sealant
The two-component sealant is based on silicone rubber. It differs from the previous one in vulcanization time and properties:
- made in mastic, in a vacuum;
- easy to apply;
- application temperature – from -20°С to +40°С;
- operating temperature – from -60°С to +70°С.
- has excellent adhesion to wood, metal, brick, pvc, concrete;
- the seam is strong and uniform.
Roofing sealant prices
The price of sealant varies depending on its characteristics and manufacturer. A 300mm package of sealant will cost on average:
- bitumen - from 196 rubles;
- polyurethane - from 155 rubles;
- silicone - from 160 rubles;
- tape - from 135 rubles.
Video
From this video you will learn how to choose the right sealant for various types roofs. An expert on roofing materials speaks.
Roof sealing is the most important aspect of the construction and operation of premises for any purpose. High quality sealant and correct installation will ensure durable and comfortable use of the roof.
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Last revision: 04/01/2016
To obtain a reliable roofing covering, it is necessary to take care in time about high-quality protection from moisture and other destructive influences of the most vulnerabilities(joints and areas of interface with auxiliary structures). To provide such protection, special sealants are traditionally used, with the help of which it is possible to quickly and without much hassle isolate any problem area. Roof sealants, which are a special class of insulating compounds, generally fall into the category polymer materials, made on the basis of silicon-organic or polysulfide rubbers and bitumen. Unique properties Such sealants (plasticity, moisture and air tightness, as well as resistance to mechanical stress) allow them to be used on roofs made from the most various materials at temperatures from - 55 to + 80 degrees.
Types and applications
Depending on the base used in preparing the composition, all sealants are divided into:
- acrylic;
- bitumen;
- polyurethane;
- silicone (rubber).
Let's look at each of these types of sealing materials in more detail.
The basis of silicone sealant (sometimes called rubber) is silicone rubber, thanks to which the composition acquires such universal properties as impermeability and ductility. The combination of these properties with resistance to sudden changes in temperature and sunlight allows its use in the construction of roofs from ceramic tiles. It goes on sale in specially dosed packaging (tube) 310 mm long.
Bitumen sealant is made on the basis of modified bitumen with the addition of aluminum pigment as a filler. This flowing material with a pleasant aluminum tint is most often used when arranging metal roofs. Its advantages include a high level of water resistance, ductility and durability. In addition, bitumen-based sealants provide excellent adhesion to both dry and wet surfaces.
With their help, it is possible to seal voids, cracks and seams that often form in metal coatings, as well as places of articulation with the roof ridge, chimneys and gutters. Due to the high toxicity of this material, it can only be used for outdoor work.
Note! Certain modifications of bitumen compositions are resistant not only to sunlight and precipitation, but also to various solvents, oils and other chemically active substances.
Acrylic roof sealants are primarily used for sealing cracks, filling seams and joints, and smoothing joints with roofing structures. Their use is most effective in those areas where there is a risk of displacement of adjacent structures due to sudden temperature fluctuations, mechanical loads or high humidity.
Modern acrylic compositions are made on the basis of siliconized additives and their characteristics are identical to high-quality silicone, differing from it more affordable price. Sealants of this class are characterized by good adhesion to brick, concrete and other porous substrates.
Thanks to the antifungal additives included in the sealant, this material prevents the formation of mold and mildew on the roof surface. A transparent sealant made on the basis of acrylic in its own way appearance not much different from silicone. It ensures a perfectly smooth and transparent seam when sealing siding coverings and ventilation openings.
Polyurethane sealant is made from a resin polymerized under certain conditions in the form of a viscous homogeneous mass that adheres well to any surface. This protective material is very effective at sealing interpanel seams on flat roofs and can be used at fairly low temperatures.
Note! Polyurethane sealants are available in two versions, one of which – sealing – is intended for use on dry surfaces. The second type of this composition has excellent waterproofing properties and is used in conditions of high humidity, as well as for sealing areas that have direct contact with water.
This substance is quite easily applied to the surface to be treated and hardens quickly. To reliably insulate joints and seams, you only need a very small amount. polyurethane sealant, which is consumed very sparingly during application. Polyurethane sealant is often used and, if necessary, to protect roof areas from UV irradiation, as well as from the appearance of microorganisms on its surface.
The use of this material during roofing work significantly increases the strength of the entire coating as a whole. In addition, this unique composition perfectly retains its protective properties and is not prone to peeling and destruction over a long period of time.
Individual types of polyurethane composition differ in hardness, which is designated by special codes according to the classification below:
- For sealing seams roofing coverings, when processing joints with metal, wood and concrete surfaces Roofing sealant with a hardness rating of PU 15 is used for auxiliary structures.
- When treating surfaces made of reinforced concrete, glass and metal, insulating compounds with code PU 40 are used.
- For processing metal structures, the material designated PU 50 is more suitable.
To summarize the description of polyurethane sealant, we can state that this material is resistant to mechanical loads, moisture and active chemical compounds(acids, gasoline, various oils), and is also not subject to corrosion. In addition, it sets quickly enough and is easily painted with various dyes. Work with this material can be organized even in winter, since it retains its properties at low temperatures. The only thing that is not recommended is to use such a sealant in sunny weather, since in bright daylight its insulating ability is somewhat reduced.
Preparation of surfaces and joints
As noted earlier, the choice of a specific type of sealant to protect problem areas on the roof depends on the type of surface on which it is intended to be used. In addition, measures for sealing various junctions and joints, as well as special expansion joints must be carried out taking into account certain rules, suggesting the following order of operations:
- work on sealing problem areas begins with preparing them for the application of protective material. For this purpose, such places are thoroughly cleaned of dust, solution residues and other contaminants. IN winter time using a metal brush, snow, accumulated ice and frost are removed from the surfaces of seams and junctions;
- To obtain an even seam, it is recommended to seal the adjacent areas with a special tape, which is removed upon completion of the work. In order to ensure good adhesion (adhesion) to the sealant, the inner edges of the seam are primed with a special primer before processing;
- When preparing surfaces for processing, the quality of their cleaning is checked by test applying a small portion of sealant to problem area. Upon contact with a well-cleaned area, the test composition will not curl under the spatula, which indicates its reliable adhesion to the surface;
- If it is necessary to seal the mouths of the joints, special sealing (anti-adhesive) gaskets should be used to ensure reliable thermal insulation. In addition, such gaskets allow you to save on the material consumed for sealing the seam, since when processing deep mouths they can serve as depth limiters. As such gaskets, bundles of polyethylene foam or polyurethane foam are most often used.
Features of application and prices
You may encounter the peculiarities of using sealants already at the stage of their preparation, since they may differ in their composition. Thus, one-component sealants go on sale already finished form and therefore do not require preliminary preparation. When using two-component mastics, their constituent ingredients (base and hardener) must be mixed in a certain sequence and proportion specified in the instructions for use.
Ready-to-use sealants must not be diluted with solvents, which disrupt the structure of the material and significantly increase its hardening time. Moreover, each of the types of compositions we have considered has its own indicators of readiness time that are different from others:
- Thus, silicone sealant completely hardens in about 30 minutes; in this case, the rate of its polymerization is determined by the thickness of the resulting seam and the ambient temperature.
- For final polymerization acrylic sealant it will take at least 21 days, although 20 minutes is enough for it to fully set.
- Polyurethane sealant cures thoroughly in about 12-14 days, while it cures in 1.5 hours (note that a respirator and gloves must be worn when handling this type of sealant).
- The readiness time of bitumen sealant applied in thin layers is determined by the number of layers and the ambient temperature.
As for the cost of the sealants used, it depends on the specific composition, its performance characteristics, as well as on the manufacturer. Approximate prices for some types of sealant (per package) are given below:
- polyurethane (Industry PU-25, for example) – up to 450 rubles;
- rubber sealant (Tytan, 310ml) – from 185 to 240 rubles;
- bitumen sealant – from 70 to 220 rubles;
- silicone - from 160 to 225 rubles.
Video
About Zigger PF Roof Sealant.
