Mapei Premium Mortar Ceramic Tile Mastic Marble – 3.5 Gal

For use with ceramic porcelain and most types of marble and natural stone tiles. Tile up to 20-in. Suitable substrates: gypsum wallboard dry walls only cement board exterior-grade plywood interior only concrete and masonry block. Mold and mildew-resistant. For use on shower floors and walls. For interior use only. Smooth and easy to spread premixed adhesive. May contribute to LEED certification project points.