The popular polymer-cement waterproofing agent Ceresit CR 65 can be used to protect both foundations and basements, and walls or even roofs of houses from moisture. This material is easy to apply, effective and lasts a long time.
general description
Ceresit CR 65 is a dry, balanced mixture of cement, mineral filler and polymer additives. Before use, add water in the amount indicated in the instructions on the package. Use Ceresit should be within two hours from the time of preparation of the coating mixture.
Most often, this mixture is sold in paper bags of 5 kg. It should be stored in a dry room no longer than one year from the date of release. If the material gains moisture, it will lose some of its properties.
Advantages of a waterproofing system
The advantages of this material can be attributed primarily:
Low cost. The price of a bag of 25 kg can range from 900-1000 rubles.
Frost resistance .
High vapor permeability.
Possibility of use for both indoor and outdoor work.
Easy to apply. To coat the surfaces with this material, you can use a simple brush or spatula.
Ecological safety. The mixture does not include any additives harmful to human health. This material can also be used for waterproofing tanks designed for storing drinking water.
Resistance to aggressive environments.
Scope of application
Most often, Ceresit CR 65, a cement-based waterproofing compound, is used to coat structural elements of buildings and structures buried in the ground. This can be foundations, cellars, basement floors, cellars, etc. They also use this material to isolate various types of tanks intended for water: pools, pits of sewage treatment plants, etc.
In addition, the manufacturer recommends the use of Ceresit to protect walls, floors and ceilings of wet rooms. For example, showers, bathrooms, saunas, kitchens. However, in this case, tile or porcelain tile must be glued on top of the waterproofing.
Sometimes the walls of tunnels are also coated with this material and used for injection filling of voids during the repair of structural elements of old buildings and structures.
Under what conditions can be used
It is allowed to work with Ceresit CR 65 waterproofing agent at the temperature of the base being trimmed not higher than +30 ° C and not lower than +5 ° C. This material cannot be mixed with any other. Since Ceresit contains cement, an alkaline reaction occurs when mixed with water. And therefore, when carrying out work, eyes should be protected from splashing solution. You should wear thick cotton gloves on your hands.
Specifications
What exactly are the working properties of the waterproofing mixture Ceresit CR 65 can be seen in the table below.
Parameter | Value |
Amount of water required | 5 kg - 1.2 liters |
Solution Production Time | No more than 2 hours |
Tile adhesion | Not less than 0.8 MPa |
Permissible use temperature | From -50 C to +70 C |
Density | 1.64 kg / dm 3 |
Here are the characteristics and has the popular tool Ceresit CR 65. Its consumption for a layer of 2 mm is about 3 kg / m 2 , in 3 mm - 5 kg / m 2 , in 5 mm - 8 kg / m 2 .
Foundation requirements
It is possible to use waterproofing material of this brand only on surfaces that are dense, vapor-permeable, and have sufficient bearing capacity. It is not allowed to use the mixture for the treatment of structures constructed from materials containing gypsum or mineral salts.
All sorts of defects and cracks before coating with a material such as a waterproofing mixture Ceresit CR 65 should be repaired. To do this, it is best to use a mixture of Ceresit CX 5. Immediately before the coating itself, the surface must be thoroughly moistened (without the appearance of puddles). To wet, you can use a whisk.
How is used
Waterproofing Ceresit CR 65 as follows:
A little dry mixture is poured into a suitable container and shut with water at room temperature. The amount of waterproofing is selected so that the finished mixture is fully developed within the prescribed time.
Mix thoroughly. For this procedure, it is best to use a construction mixer or drill with the appropriate nozzle. In this case, the solution will turn out to be much better.
The finished mass is left to ripen for 5 minutes.
Again, everything is thoroughly mixed. The finished mass should be ductile and not too thick.
A layer of waterproofing is applied to the cleaned, leveled surface. The easiest way to use a brush for this purpose.
After a while, a second layer is applied. In this case, usually use either a brush or a spatula. The first layer before applying the next should harden slightly, but not dry. If the time interval between the two coatings is more than 12 hours, the adhesive composition CC 81 from the same manufacturer should be added to the Ceresit CR 65 mixture. The consumption rate is 2.4 liters per 25 kg of mixture. When applying the second layer, the brush should be directed perpendicular to the stripes of the first.
Tiles on the surface thus treated can begin to be glued after three days. An exception is those cases when the means of CM 12, CM 14 Extra or CM 11 Plus are used to fix it. When using these compounds, the tile should be glued no later than one day after the waterproofing. It is possible to fill pools and reservoirs with water in 5 days after installation of a tile.