CM 77 adheres to all clean, solid, load-bearing, even, dry
and moist substrates, which are free from substances which can reduce adhesion. Uneven areas or depressions should be levelled before (see Ceresit Flooring and Interior Finishes products). Coatings of insufficient load-bearing strength must be removed. Gypsum/anhydrite or paint coats (not chalking, good adhesion) must be mechanically roughened and freed from dust.
CM 77 adheres without special pre-treatment to metal, glass, wood, concrete, plasters, cement screeds, Xylolite, old tiles, artificial stone and heated screeds! Fresh cement screeds (3 to 5 days after installation) must be primed with CL 71 or CK 740.
Please refer to the Technical Data sheet!