Custom Building Products FlexBond Gray 50 lbs. Fortified Thin-Set MortarSuitable substrates include interior and exterior floors, countertops and walls Can tile directly over cracks up to 1 16 in. without repairs Suitable tile types also include natural stone, brick and thin brick Exceeds ANSI A118. 4 and A118. 11 standards without the need for additives Dries in 24 hours Resists mold and mildew Qualifies for a lifetime system warranty California residents Features Flooring Type Cement,Ceramic,Glass,Porcelain,Stone,Tile