All surfaces are to be clean and free from loose or bond breaker substances.
It is important to clean all surfaces of the powder residue. This can be accomplished with a damp cloth or compressed air. The floor layout should be pre-determined in advance with snap chalk lines. To apply thin-set, use only a x inch Square Notched Trowel. Water-based mortar is not recommended on concrete tiles, as they are very porous and absorb moisture rapidly.