Custom® MTSG50 VersaBond® Fortified Thin­-Set Mortar, 50 Lb, GrayA professional formula, all purpose mortar, polymer modified to provide good bond strength for floor and tile projects. VersaBond cures quickly even in cold climates and adheres to most surfaces, exceeding ANSI A118. 4 and A118. 11 without the need for additives. 50 LB, Gray Bonds well to plywood and concrete floors Fast setting even in cold weather. Suitable Tile Types: Vitreous, semi vitreous or non vitreous tile: ceramic, mosaic, quarry, cement