CT 17


Penetrating primer »solvent free«
Ceresit CT 17 is used to prime substrates (walls, floors, ceilings) inside and outside buildings before fixing ceramic tiles, pouring floors, fixing floor coverings, wallpapering, putty, painting or fixing thermal insulation boards.


  • Solvent-free 
  • Surface-strengthening 
  • Reduces absorbency
  • For indoor and outdoor use

This TDS is applicable for the United Arab Emirates only. Please contact your local Polybit sales office for the available TDS in your region



CT 17 can be used on all solid, load-bearing, clean and dry surfaces free of substances which may impair adhesion. Before applying CT 17, test the load-bearing capacity and strength of the substrate. Anhydrite screeds (dry) must be mechanically roughened. Clean the surface and remove any dust. Mask off windows, doors and other parts as well as adjoining areas, and/or clean them with water immediately after priming.


Apply CT 17 directly with a brush or suitable roller. Depending on the site-specific drying conditions on absorbent substrates, work can be continued with Ceresit tile adhesive and floor screeding compound after only 2 to 4 hours. After hardening, the surface must be scratchproof. If not, prime again. Clean the tools with water after use.


Polybit CT 17: Invisible Power