Subtleties of application of waterproofing Ceresit CR 65

The mix Ceresit CR 65 is waterproofing dry structure. It is intended for the formation of coatings on non-gypsum and non-mineral bases. After dilution, the mixture can be applied on the floors, walls, as well as on the facade of the building. When cured on the surface treated with waterproofing compound CR 65, a stable waterproof coating is formed.

The mixture of Ceresit CR 65 is most often used for the following work:

• waterproofing of swimming pools, baths, various water storage tanks;
• treatment of walls and ceilings of wet rooms for subsequent tiling;
• protection of sewage treatment and hydraulic structures and communications from exposure to water, as well as low temperatures;
• protection of concrete structures from moisture and precipitation;
• waterproofing of buried and underground premises, cellar structures;
• filling voids in the masonry of old and decaying buildings.

Consider the main features and properties of the mixture Ceresit CR 65.

• The composition of the dry mixture Ceresit CR 65 includes polymer and mineral components, cement, modifiers.
• In a frozen form, the composition is frost-resistant and water-resistant. Due to these properties, high waterproofing is ensured.
• The coating formed from a mixture of CR 65 is resistant to deformation and the effects of salt and alkaline solutions and petroleum products.
• The waterproofing layer of Ceresit CR 65 has a high vapor permeability.
• The composition has high adhesion to the surface of the base.

A mixture of Ceresit CR 65 is so popular for its characteristics.

• The prepared mixture solution has a consumption of 3 to 8 kg per 1 m2. The consumption rate directly depends on the required thickness of the applied solution, as well as on the number of layers. When applying the prepared mixture in two layers of small thickness consumption will be minimal. And, on the contrary, if it is necessary to increase the total thickness of the protective waterproofing coating, the costs of the mixed composition should be calculated on the basis of maximum indicators.
• Instructions for use recommends that you calculate the volume of water based on the ratio of 5.5 liters per 25 kg of dry mix CR 65.
• After mixing, the solution must be consumed within two hours.

• After applying to the surface a layer of waterproofing coating becomes resistant to moisture, water and precipitation after 24 hours.
• The surface on which the solution is applied should have a temperature not lower than + 5 °. The maximum allowable temperature of the base should not exceed + 30 °.
• Recommended for work humidity should be about 60%.
• Facing work on the surface treated with a waterproofing mixture can be performed no earlier than after 7 days.
• Ceresit CR 65 acquires maximum waterproof and waterproofing properties 28 days after application to the substrate.

It is important to properly prepare the mixture solution, adhering to certain rules.

• In the prepared container of sufficient capacity it is necessary to pour the right amount of water. Water should not be cold, it is recommended to use for mixing water having a temperature of 15 ° -20 °.
• Dry mixture should be poured into water in small portions, while mixing the solution. For convenience and more thorough mixing, you can use a drill with a special nozzle when diluting the mixture.
• You should make sure that the dry composition is well mixed, and there are no lumps in the solution.

It is important to remember that the finished solution must be consumed within 2 hours. After this time, the prepared composition will become unsuitable for application.

Surface preparation involves several sequential steps.

• The base should be fairly tight and level. The surface on which the waterproofing solution will be applied must also be vapor-permeable.

• The substrate should be well cleaned from dirt, oily substances, particles of plaster or bitumen. Negative impact on the strength of adhesion of the solution to the surface traces of glue, paints and varnishes.

• Ensure that there are no salt deposits on the surface of the base.
• If the base is covered with a layer of material with low strength, it must be removed and the surface leveled.
• The notches and seams in the walls and ceilings must first be cleaned and filled with cement.
• If the premises were recently renovated, it is better to wipe the surface of the base with an acidic solution of a small consistency. Remove contamination by rinsing with high pressure water.
• If the base for waterproofing has a non-uniform surface, then after cleaning, dedusting and degreasing, it must be plastered (it is recommended to use a mixture of CT 29 or CT 24).

The application of the solution Ceresit CR 65 should be carried out carefully and according to technology.

• The mixture is well applied with a hard brush, construction spatula or scapula.
• The solution is applied in at least two layers.
• The first layer should be applied on a moist base. However, the surface should not be wet. Water drops should be blotted with dry material. Then you need to wait for the entire surface to dry to a slightly wet state.
• The layer should be applied in the same direction over the entire area of ​​the base.

• After a slight hardening of the surface of the applied layer, the following is superimposed on it. This time the movements should be perpendicular to the direction of the first layer. Councils of masters: it is better to apply the second layer with a spatula, and the solution for each subsequent layer should be slightly thicker than in the previous application.
• Then each subsequent layer is applied in the perpendicular direction relative to the previous one.
• It is important to ensure that the entire surface treated with the solution was evenly coated with the composition.
• The applied waterproofing solution should not dry too quickly.

Rigid waterproofing Ceresit CR 65 has good reviews from buyers and master finishers. Plasticity and easy distribution of the finished solution, as well as good solubility and very weak lumpiness of the dry composition during mixing are most often noted as advantages.

The mix Ceresit CR 65 is delivered in points of sale in dense paper packages on 25 kg.Without opening the package, the mixture can be stored for 12 months.

For more information on how to waterproof using Ceresit CR 65, learn from the following video.