Any construction requires the organization of a whole range of measures to protect it from moisture, precipitation and other external environmental influences. As for concrete and structures based on it, this material is different in that it absorbs moisture well, which, unfortunately, over time affects its quality. In this regard, all buildings must be protected from moisture in advance, for this you can use waterproofing mastic.
What is waterproofing mastic?
This is a mixture of various substances for bonding, cementing, coating cracks and voids in order to make the surface impervious to water. What is waterproofing mastic ? This is a composition of oil, bitumen, astringent, organic solvent, mineral filler, plasticizer and antiseptic. The main feature of this material is compatibility with many waterproofing elements. In other words, mastic is a kind of composite, which is a highly stable adhesive mass. In addition, waterproofing mastic (MGTN) is relatively cheap, very reliable and does not require special skills when working with it.
Application of mastic
For the implementation of construction and finishing works at various levels, waterproofing mastic "TECHNONICOL" (24 MGTN) based on bitumen has found wide application. Its popularity is associated with the universal operational characteristics of building material, due to which it is practically indispensable for:
- The arrangement of the roof at all levels.
- Installation of the foundation.
- Flooring.
- Sealing window and door openings.
- Seamless coating device, for example for swimming pools.
- Arrangement of various engineering communications.
- Laying pipelines.
In addition, waterproofing mastic (24 MGTN) is used to seal various joints and abutments, to protect metal structures and installation joints from atmospheric precipitation, and to coat various surfaces of concrete, basements, loggias, wooden structures, and bathrooms, as parquet adhesive , for corrosion protection of car body parts.
Types of Mastics
There are several types of mastics, for example, hot and cold. The first are prepared directly at the construction site before the start of waterproofing. One of the primary indicators of this mastic is its cheapness in relation to cold. Mastic waterproofing "TECHNONICOL" of the second type is made at the enterprise. There, bitumen is mixed with various fillers and components and packaged in a special container - metal buckets of 20 liters. This building material is completely ready for use, it does not need to be heated and various substances added.
There is another type of mastic - waterproofing material based on acrylic. It is an excellent insulator of concrete from moisture. After applying acrylic mastic, the surface becomes resistant to cracking, which can occur from uneven shrinkage of the foundation or other movements in the building structure.
Mastic Properties
Hot mastic based on bitumen is an ideal tool to protect all surfaces from mold, rust, dampness. This material has excellent penetrating ability, filling the pores of the upper layer of concrete, thereby preventing moisture from penetrating inside. Its effect on the structure is possible not only outside, but also inside the building.
Cold mastic waterproofing "TECHNONIKOL" 24 MGTN is able to resist the effects of water vapor. Compared with rolled insulation materials, this type creates a seamless coating due to a certain application method, because it is joints that are the weakest link in waterproofing. Mastic does not crack after hardening and has increased strength. It is applied to the surface with the help of ordinary building tools, with no particular difficulties.
Physical properties of bituminous mastics
Due to its properties, TEKHNONIKOL mastic is recommended for use for exterior and interior insulation protection of building structures. Physical properties of bitumen material:
- Flexibility and elasticity.
- Excellent waterproof performance.
- In the frozen state, high strength.
- Homogeneous structure.
- Universality.
- Effective use on porous and uneven surfaces.
Technical characteristics of waterproofing mastics
Industrial enterprises that specialize in the production of various building materials produce waterproofing mastic. various brands and specifications. Depending on the type, the composition may include:
- Some types of natural and organic resins.
- Synthetic plasticizers.
- Natural rubber and active binders.
These mixtures, when used, do not emit harmful substances and retain chemical neutrality. In addition, the most popular waterproofing mastic 24 contains special components that provide the material with antiseptic and herbicidal properties. Thanks to all additives, it is durable, flexible and resistant to environmental influences. Depending on the drying time, bitumen-rubber mastic can be:
- Non-drying. Liquid gummy non-drying mixtures are able to remain in a jelly-like state for a long time ..
- Quick drying. This mixture hardens in a short time, while taking the necessary shape.
- Drying out. This mastic is a medium condition between non-drying and quick-drying.
Also, this material is divided by the characteristics of the reaction to mechanical stress. Waterproofing mastic happens:
- Elastic.
- Plastic or hard.
Consumption of bitumen mastic depends on its type. Due to its excellent astringent properties and the ability to reliably bond with other materials, waterproofing easily fits into any, whether horizontal or vertical joint.
The process of surface treatment with waterproofing mastic
Before applying the waterproofing material, it must be thoroughly mixed to a homogeneous mass. When hardening, a solvent must be added to the mixture. It is necessary to store building material in a closed container and in a warm place.
When waterproofing mastic "TECHNONICOL" 24 is applied, any base must be cleaned of dust, dirt, grease, and ice. And one more thing: before you start laying the waterproofing, the surface must be primed, that is, treated with a special primer. This is especially true for a porous surface. In the case when the mastic is applied to the metal parts of the structure, it is recommended that they be cleaned of rust and treated with a solution against its formation. The surface for applying the waterproofing material must be dry, if necessary, it is additionally dried.
Features of work with mastic
During installation, the room must be ventilated. Also, during operation, the use of an open fire is not allowed, since bitumen mastic is a combustible and highly flammable material. If the outside temperature is minus, the waterproofing mastic needs to be heated. It is applied in layers with brushes, rollers, sprayers. It is advisable to make two layers along and across. The approximate drying time for each is 6–9 hours. Spillage of the waterproofing on the surface and its subsequent leveling by means of a squeegee is also allowed. The average time for complete drying and solidification of the mixture, as well as a set of all necessary properties, is 7 days. Approximate consumption of bitumen waterproofing 1 kg per 1 square. m. surface.
The excellent quality of waterproofing mastic, its high environmental friendliness, ease of installation are appreciated by most professionals in the field of construction, so it is so popular among experienced craftsmen.