Construction mixtures for concrete waterproofing

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Constantly wet walls, foundation, basement – how to protect yourself from this? We will tell you about the waterproofing mixtures that are relatively new on our market, what they are, consider the features of their use.

Construction mixtures for concrete waterproofing

Previously, almost all waterproofing work was carried out using bituminous and bitumen-polymer roll and mastic materials. Over the past few years, new technologies have come to our country. One of these new products is waterproofing mixtures, which are becoming more and more popular when constructing a waterproofing layer for concrete foundations, walls and basements..

There are several types of waterproofing mixtures:

  • mixtures for penetrating waterproofing
  • mixtures for coating waterproofing
  • mixtures for plaster waterproofing
  • mixtures for seam waterproofing
  • mixtures for repairing active leaks

The composition of dry mixtures for waterproofing includes cement, sand, chemical and polymer additives that enhance the hydrophobic characteristics, frost resistance and plasticity of the finished composition.

The leaders of the domestic market of waterproofing mixtures are the Russian brands Gidroteks, Lakhta, Kalmatron, less often they are bought by foreign Sika, BASF.

Waterproofing mixtures have a number of advantages:

  1. Apply to damp or wet surfaces. No need to wait for concrete to dry.
  2. Do not require special training to perform work.
  3. The compositions can be applied both from the outside and from the inside of the building..
  4. Compositions eliminate microcracks during operation.
  5. Their service life is equal to the service life of the entire concrete structure..
  6. Non-flammable, non-toxic, environmentally friendly.
  7. Approved for use in all industries, including food.
  8. The waterproofing properties of the composition are retained even with mechanical damage to the concrete structure.

Mixes for penetrating waterproofing

Waterproofing compositions of penetrating action are used in the device of waterproofing concrete and reinforced concrete structures. They cannot be used in combination with brick, foam and aerated concrete, since the pores of these materials are too large. Unlike other waterproofing compounds, penetrating mixtures form a waterproof barrier not on the concrete surface, but in its thickness. The penetration depth of the composition can be up to 400 mm.

Concrete treated with this composition becomes more frost-resistant and durable, its sulfate resistance increases. At the same time, breathability does not suffer.

Construction mixtures for concrete waterproofing

Mixes for penetrating waterproofing can be used for waterproofing foundations, basements, balconies, bathrooms, swimming pools, tanks with water and other chemicals, as well as underground storage.

Works on the construction of a waterproofing ball can be carried out inside and outside the premises. To apply the composition, conventional tools and finishing equipment are used. The mixture is applied only to a damp surface. After the completion of the work, the treated concrete must be moistened every 6-8 hours for 3 days.

For the device of penetrating waterproofing, the following mixtures are used: LAKHTA penetrating waterproofing (cost 156 rubles / kg), Kalmatron (80 rubles / kg), Gidroteks-U (56 rubles / kg).

Compositions for coating waterproofing

Waterproofing mixtures of the coating type can be used when installing a waterproof ball on both concrete and brick surfaces. The thickness of the ball for laying the waterproofing is 2–6 mm.

There are two types of compositions: dry mix (one-component composition) and polymer-cement (two-component composition of dry mix and polymer aqueous dispersion). The second option is used when waterproofing the surfaces of structures that are subject to increased cracking, deformation, vibration and settlement.

Construction mixtures for concrete waterproofing

The composition is applied to a damp surface in 2-3 balls, depending on the method of application. Moreover, the second and third run must be done without waiting for the previous ball to dry, perpendicular to the penultimate.

The treated surface should be protected from direct sunlight for 24 hours. Finishing lining work can be carried out within 24-48 hours after waterproofing.

Important! Do not apply the composition over the self-leveling floor and gypsum plaster..

The most famous mixtures for coating waterproofing: Lakhta coating waterproofing (cost RUB 77 / kg), IVSIL VODOSTOP (RUB 22 / kg), Alfapol GO (RUB 25 / kg).

Plaster waterproofing

A simple way that allows you to simultaneously level the surface and arrange its waterproofing. Can be used on internal and external surfaces of walls and foundations, on dense concrete, on brickwork, on top of already applied plaster. The mixtures provide increased water resistance, while maintaining vapor permeability.

It is applied in one or several layers with a conventional hand-held finishing tool: spatula, spatula, trowel. To lay the next layer, it is not necessary to wait until the previous one is dry, but a period of at least 24 hours is needed between two passes. The thickness of laying the mixture in one pass is not less than 2.5 mm. The composition is carefully leveled in one direction.

Construction mixtures for concrete waterproofing

During work and after laying, the surface should be protected from sunlight and drafts..

The most popular brands of mixtures for plaster waterproofing: Ceresit CR 65 (cost 35 rubles / kg), “Lakhta plaster waterproofing” (54 rubles / kg), “ALIT GR-1” (38 rubles / kg).

Suture waterproofing

Seam waterproofing mixtures are designed to seal joints and seams and protect them from the effects of aggressive media. They are primarily used in swimming pools, wells, balconies, foundations and walls..

The composition is applied to a damp surface. Before applying to the embroidered strobes, apply the mortar and carefully seal them. The applied mixture must be protected from frost, drafts and sunlight for 48 hours. If necessary, the surface is subjected to additional moisture and protected with plastic wrap. This is necessary to avoid drying out..

Construction mixtures for concrete waterproofing

Tiles can be laid 3-4 days after work.

For seam waterproofing, the following types of mixtures are used: IVSIL GIDROLINE (cost 67 rubles / kg), “Lakhta suture waterproofing” (99 rubles / kg), “Gidroteks-Sh” (80 rubles / kg).

Comparative characteristics of waterproofing mixtures:

Characteristic “LAKHTA penetrating waterproofing” “Kalmatron” “Gidroteks-U”
Application temperature (environment), ° С +5 … + 35 from +5 from +5
Mixing water consumption, l / kg 0.625 0.23-0.25 0.2
Average material consumption, kg / m2 0.8-1.2 1.6 2-3
Solution life time, min. thirty thirty 25-30
Adhesion to concrete at the age of 28 days, MPa 3 3 2
Penetration depth of crystalline hydrates, mm 200 150 200

This table compares the main characteristics of the most popular waterproofing mixtures. With its help, you can decide on their choice for the waterproofing device of your home.

Waterproofing mixtures are a relatively new material on the domestic market, but the demand for them is constantly growing. This is due to the constant process of improving the material, improving the characteristics and producing new types of mixtures both in our country and abroad. Mixes and compounds for waterproofing, when properly selected and applied, guarantee excellent results.

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