Gallon, Gray, Thin Set Mortar, This No-Mix, No Mess Alternative To Traditional Thin Set Mortars Spreads Quickly & Easily, Bonds Ceramick Tile Up To 18" x 18", 45 x 45CM, For Interior Wall & Floor Installations, Protected With Moldgard Technology To Resist Mold & Mildew Growth, Exceeds Ansi A136.1, Type I.