Homeliness, Repairs
Waterproofing Ceresit CR 65: description, use
The popular polymer cement waterproofing device Ceresit CR 65 can be used to protect against moisture as foundations and cellars, as well as walls or even roofs of houses. This material is easy to apply, effective, and very long.
general description
Ceresit CR 65 is a dry, balanced mixture of cement, mineral filler and polymer additives. Before use, water is added to it in the amount specified in the instructions on the package. Use Ceresit should be within two hours from the date of preparation of the lubricating mass.
Most often this mixture is sold in paper multilayer bags of 5 kg. Keep it in a dry place not longer than one year from the date of release. If the material collects moisture, it will lose some of its properties.
Advantages of waterproofing
The advantages of this material can be attributed in the first place:
Low cost. The price of a bag of 25 kg can fluctuate between 900-1000 rubles.
Frost resistance .
High degree of vapor permeability.
Possibility of use both for internal and external works.
Ease of application. For surface coating with this material, you can use a simple brush or spatula.
Ecological safety. The composition of the mixture does not include any additives that are harmful to human health. Use this material can be, including for the waterproofing of tanks intended for storage of drinking water.
Resistant to aggressive environments.
Scope of application
Most often Ceresit CR 65, a cement waterproofing mass, is used to coat buried structural elements of buildings and structures. This can be foundations, cellars, basement floors, cellars, etc. This material is also used for the isolation of various types of reservoirs destined for water: basins, foundation pits of treatment facilities, etc.
In addition, the manufacturer recommends the use of Ceresit for the protection of walls, floors and ceilings of wet rooms. For example, shower rooms, bathrooms, saunas, kitchens. However, in this case, over the waterproofing must be glued tiles or granite.
Sometimes this material is also smeared on the walls of tunnels and uses it for injection filling of voids when repairing structural elements of old buildings and structures.
Under what conditions can be used
Work with the waterproofing Ceresit CR 65 is allowed at the temperature of the substrate to be removed not higher than +30 о С and not below +5 о С. It is impossible to mix this material with any others. Since Ceresit contains cement, when it is closed with water, an alkaline reaction takes place. And therefore, when carrying out the work, it is necessary to protect your eyes from getting into them a spray of solution. Put cotton thick gloves on your hands.
Specifications
What are the working properties of the waterproofing mixture Ceresit CR 65 can be seen in the table below.
Parameter | Value |
Required amount of water | For 5 kg - 1.2 liters |
Time of solution production | Not more than 2 hours |
Adhesion when using tiles | Not less than 0.8 MPa |
Permissible use temperature | From -50 С to +70 С |
Density | 1.64 kg / dm 3 |
Here are the characteristics and has a popular tool Ceresit CR 65. Its consumption for a layer of 2 mm is about 3 kg / m 2 , 3 mm - 5 kg / m 2 , 5 mm - 8 kg / m 2 .
Requirements to the base
Use the waterproofing material of this brand can only on the surfaces of dense, vapor-permeable and possessing sufficient load-bearing capacity. It is not allowed to use a mixture for the treatment of structures constructed from materials containing gypsum or mineral salts.
Various kinds of defects and cracks before coating with such a material as the waterproofing mixture Ceresit CR 65, should be sealed. 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). For wetting, you can use a whisk.
How to use
Waterproofing Ceresit CR 65 as follows:
A little dry mixture is poured into a suitable container and closed with water at room temperature. The amount of waterproofing is selected in such a way that the finished mixture is completely worked out within the time required.
Make a thorough mixing. For this procedure, it is best to use a construction mixer or a drill with a suitable nozzle. In this case, the solution will be much better.
The finished mass is left to ripen for 5 minutes.
Again, everything is thoroughly mixed. The finished mass must be ductile and not too thick.
On the cleaned, leveled surface, a layer of waterproofing agent is applied. The easiest way is 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 must be slightly hardened before application of the subsequent layer, but do not dry. If the time interval between the two coatings is more than 12 hours, the adhesive composition CC 81 of the same manufacturer should be added to the Ceresit CR 65 mixture. The rate of its consumption is 2.4 liters per 25 kg of the mixture. When applying the second layer, the brush should be directed perpendicular to the bands of the first.
Tiles on the surface thus treated can be started to glue after three days. An exception are those cases when it is used for fixing the means CM 12, SM 14 Extra or CM 11 Plus. When using these compounds, the tiles should be glued not later than a day after the waterproofing works. Fill pools and reservoirs of water can be 5 days after the installation of tiles.
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