Gallon, White, Thin Set Mortar, This No-mix, No Mess Alternative To Traditional Thin-Set Mortars, Spreads Quickly & Easily, Bonds Porcelain, Stone, Marble, Granite & Ceramic 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.