50 LB, Gray, Versa Bond, Thin Set All Purpose Mortar, High Strength, Use For Installing Over A Wide Range Of Surfaces, Polymer Modified, Meets ANSI A118.4, Versa Bond Is A High Strength, All Purpose Bonding Mortar For Floors & Wall Tile Projects, Cures Fast Even In Cold Weather Climates, Just Add Water, No Additive Needed.