Preparation of walls and other surfaces for ClayBeton finishing works

When working with the ClayBeton mixture, it is essential not only to level but also to properly prime the decorated surfaces. Carefully follow all recommendations to achieve a surface that adheres firmly to the base and results in an even, consistent concrete-effect finish.

Preparation of gypsum/lime/cement plaster:

If the wall leveling plaster is applied evenly and has no raised or sunken defects, the surface does not need to be skim-coated. Proper priming will be sufficient.

• Cement/lime plaster: prime with a contact primer containing quartz sand, making sure to carefully coat all external corners.

• Gypsum plaster: prime with deep primer Ardex P51 (diluted with 2 parts water) and additionally apply a contact primer containing quartz sand.

Preparation of plasterboard (gypsum board):

Usually, before applying the ClayBeton finish, full skim-coating of the walls is not necessary. However, all joints, corners, and screw heads must be carefully filled and leveled with the surface. There must be no dents, bumps, visible paper tapes, or metal corner beads.
The specific materials used for preparing plasterboard surfaces are not critical — follow the recommendations provided by the board manufacturer.

The most important step is to properly prime the plasterboard.
First, apply deep primer Ardex P51 (diluted with 1 part water), and then additionally use a contact primer with quartz sand.

If you use a deep primer that is too weak in concentration, differences in drying time may cause lighter-colored stripes along the jointed areas, reflecting the lines of the joints.

Preparation of concrete surfaces:

The base must be stable, load-bearing, and free of loose particles.
First, apply deep primer Ardex P51 (diluted with 4 parts water), and then additionally use a contact primer with quartz sand.

For more information on preparing other surfaces or if you have any questions, please contact the Mr. Clay team directly.

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