which one to choose? Foundation and Features - Review + Video

which one to choose? Foundation and Features - Review + Video For waterproofing concrete and brick structures, they are treated with bitumen. Although this material in its pure form has certain disadvantages - the material is quite difficult to apply, and under the influence of external temperature drops, its protective film can crack. The composition of modern bituminous mastics contains substances that increase the hardness and durability of the waterproofing outer coating.

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Below we will consider in more detail the technical and operational properties of bitumen, as well as what technology must be followed when applying this material to the surface. which one to choose? Foundation and Features - Review + Video

What does bitumen mastic consist of

Mastic - very flexible material.

It has high binding and waterproofing properties. In addition to bitumen, the main composition of the material contains organic binders and mineral additives.

which one to choose? Foundation and Features - Review + Video Density, resistance to low external temperatures, and hardness provide the following inclusions:

  • dusty asbestos;
  • special mineral wool;
  • brick, quartz and limestone powders;
  • ash.

The presence of such thickeners as: chalk, peat chips and ground asbestos will guarantee the convenience of applying the mastic, reducing consumption and improving the thermal insulation properties of the material.

Special fiber fillers are responsible for high resistance to bending and reinforcement of the composition.

And various polymer components will give the material high waterproofing properties.

Bituminous mastic - scope

To determine the scope of application of bitumen mastic, you need to know its technical characteristics and properties:

  • the strength index is 0.2-0.5 kgf / cm2; which one to choose? Foundation and Features - Review + Video
  • the strength index of adhesion to concrete is 0 , 3-0.4 kgf / cm2;
  • moisture absorption during one day by weight does not exceed 0.

    5-1%;

  • elongation at break, depending on the type of mastic, is 100 -300%;
  • the conditional viscosity index must be at least 15-30 seconds;
  • the softening temperature is equal at least 100-130 ° C.

Technical indicators of bitumen mastic give this material the following qualities:

  1. Increased elasticity. This indicator provides reliable and high-quality adhesion of the material to the outer surface. Elasticity also keeps the outer coating from tearing and cracking.
  2. Adhesive indicators and properties.

    Bituminous mastic is used as an adhesive for roll-up waterproofing.

  3. Protection of various building structures from external influences of moisture and dampness. which one to choose? Foundation and Features - Review + Video
  4. The use of bitumen mastic will prevent corrosion.
  5. The service life of building elements and parts is increased. It should be noted that the functionality of the entire structure is sufficiently preserved.

  6. High resistance to temperature fluctuations - this is especially important when waterproofing in regions with severe climates.
  7. The outer hardening film of bitumen mastic can be painted in any color.

Bituminous mastics have a huge field of use. Most often, bitumen-based materials are used to perform such works as:

  • construction of a new roof; which one to choose? Foundation and Features - Review + Video
  • renovation of the old roof: removal of deep depressions on the waterproofing layer and leveling the base;
  • high-quality waterproofing of fountains, artificial reservoirs and pools;
  • installation of tiled coverings in places with a high humidity index;
  • protection of metal products against corrosion;
  • for waterproofing the roof at the junctions to parapets and ventilation ducts;
  • installation of a protective layer for the foundation;
  • installation of roll waterproofing;
  • installation of thermal insulation boards on mastic;
  • installation of waterproofing in buildings with insufficient ventilation and excess moisture.

The use of bitumen mastic is very important for different types of roofing: slate, metal, roll and others.

Bituminous waterproofing mastic

Bituminous mastics are classified according to three main criteria:

  1. nature of application;
  2. method of manufacture;
  3. type of elastic additives.

Depending on the technical indicators of use, two types of mastics are distinguished: cold and hot application.

Hot mastics should be warmed up to 300 ° C before use.

And this complicates the whole process of waterproofing the surface. The advantages of using hot bitumen mastics include:

  • the formation of a very strong outer coating with an increased degree of elasticity;
  • the outer protective film will not shrink;
  • work can be carried out at subzero temperatures;
  • the structure of the material is non-porous;
  • reasonable price.

which one to choose? Foundation and Features - Review + Video These bituminous mastics are often used to strengthen the base and create reliable protection for the foundation in difficult conditions.

Cold mastics are most common in use. This is explained by the following advantages of this material:

  • ease of application;
  • wide range of colors of bitumen waterproofing;
  • high resistance to ultraviolet external radiation.

Cold-applied bitumen mastic is mixed with a solvent, and after evaporation it quickly hardens and acquires the required performance properties.

According to the method of making mastics, they can be divided into two main types:

  • one-component mastics;
  • two-component mastics.

which one to choose? Foundation and Features - Review + Video One-component mastics are used immediately after opening the jar, and do not require special preparation.Although, this material has a certain disadvantage - after opening, you need to spend the entire can, otherwise the mastic will harden. This quality must be taken into account when working on a large roof area.

Two-component mastics are mixed with a thickener before use. This preparation does not take much time, and the shelf life of two-component mastics is much higher than one-component mastics.

By the type of elastic additives that make up bituminous mastics, the following types of waterproofing materials can be distinguished:

  1. Rubber-bitumen mastic. The basis of the material is a special oxidized petroleum bitumen, rubber crumb, mineral fillers, solvents and synthetic rubber. Such mastic will create a strong and reliable bond with any material. Such rubber-bitumen material is not afraid of impacts and sprains.
  2. Bituminous-rubber mastic - very elastic.

    After applying bituminous mastic, the formed protective film increases the initial length tenfold. And at the same time, tears are not formed on the product. The use of bituminous-rubber mastic is used for gluing plywood sheets, linoleum, parquet and roofing material. In addition, mastic is used as external corrosion protection for metal parts and elements.

  3. Bitumen-polymer mastic is produced from an aqueous emulsion of bitumen with a latex modification.

    This material does not contain solvents and can be used outdoors and indoors. A waterproof film forms on the hardened mastic. The use of bitumen-polymer mastic is also widespread.

Bitumen mastics from leading manufacturers

Bitumen mastic is produced by both domestic and foreign manufacturers. Below we will consider well-known trade marks: which one to choose? Foundation and Features - Review + Video

  • Hydroizol mastic;
  • bituminous roofing mastic Technomast (21);
  • waterproofing mastic (24);
  • water-based mastic (33);
  • hot mastic "Eureka" (41) ;
  • bitumen-rubber mastic (20);
  • "Technonikol" (31);
  • aluminum mastic (57);
  • hot Izhora mastic ";
  • bitumen-polymer cold mastic" Slavyanka ".

Mastics of such companies as Remmers Elastoplast and Bitumast are also in good demand.

which one to choose? Foundation and Features - Review + Video

Calculation of the bitumen mastic consumption

which one to choose? Foundation and Features - Review + Video This indicator is usually indicated on the package. If the consumption is not specified, then you can easily calculate it yourself, based on the following recommendations:

  1. The consumption of mastic will directly depend on the percentage of volatile solvents. This figure ranges from 25 to 70%. With a higher indicator, the consumption of bitumen mastic will be several times less than with a lower indicator.

  2. When calculating the consumption of mastic, you should take into account the consumption rates for various jobs.
  3. When applying the mastic to vertical surfaces, it is applied in several layers. Moreover, the second layer is applied only after the first layer has completely dried.

Methods of applying bitumen mastic

which one to choose? Foundation and Features - Review + Video Having considered the classification, you can to say that there are two main ways to apply mastic: hot and cold. Cold bitumen mastic is applied manually and mechanically.

Below we will consider in more detail the methods of applying mastic:

  1. In the manual method, large paint brushes with short and stiff bristles are used. These are usually flange brushes. You can also use a short hair seamer. When processing horizontal surfaces, the emulsion is carefully leveled with a squeegee, and then rubbed with a roller or brush.
  2. For the mechanized method, use a 150 bar airless spray.

Only sprayers that mix the components inside the unit are suitable for this job.

Bituminous mastics for cold use for roofing

which one to choose? Foundation and Features - Review + Video Below we will consider the progress of works on waterproofing bitumen roofing mastic for cold use:

  1. According to the instructions, add a solvent to the mastic and mix well.
  2. Before use, the roofing mastic must be warmed up at room temperature for 24 hours.
  3. All debris must be removed from the surface to be processed.
  4. Treat the entire roof base with a special bituminous primer.

  5. Dry the entire roof area.
  6. Pour a small amount of mastic onto the roof and smooth it over the entire surface with a mop.

Before applying the mastic, a test should be carried out to determine the degree of moisture content of the substrate.

Basic recommendations in working with bituminous mastic

which one to choose? Foundation and Features - Review + Video

  1. Waterproofing works must be carried out in dry, clear weather, at a temperature not lower than -5 ° С.
  2. All vertical surfaces must be processed in several layers.

  3. Bituminous mastic is stored in a closed container, away from sources of open fire.
  4. Apply mastic from bottom to top in parallel stripes of equal thickness.
  5. For high-quality mixing of the mastic, use a drill with a special mixer attachment.
  6. Bituminous primer is applied with a regular paint brush.
  7. Upon completion of all work, rinse all tools and brushes with mineral spirits or thinner.


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