Pre-Mixed Ceramic Tile Thin Set Mortar Gray, No-Mix, No-Mess, Quickly & Easily Spreads. Recommended for porcelain, stone, marble, granite, and ceramic tile. Tiles up to 8" x 8", or one side up to 15" with extended dry time. Interior wall & floor installations. Exceeds ANSI A136.1 Type I. V-Notch Trowel 3/16" x 5/32" - 40 ft� to 44 ft� coverage. Square-Notch Trowel ¼" x ¼" x ¼" - 20 ft� to 25 ft� coverage. Square-Notch Trowel ¼" x ¾" x ¼" - 14 ft� to 17 ft� coverage. Coverage does not include backbuttering tiles.