Homax Tile Guard Water-Based Grout Sealer for Ceramic and Porcelain For inferior and exterior use on: sanded and unsanded grout. Fast and easy application with the Spray Any-Way Nozzle for floors, walls and countertops. Penetrates & seals out stains, moisture & mildew. Excess sealer evaporates away and does not leave any hard to remove residue on the tiles. 3-Homax Grout cans. Water-Based