Homax 9550 One-Step Grout Sealer, 15-Ounce

From the Manufacturer You no longer need to clean off any residue from sealed tile after applying the grout sealer. Excess sealer evaporates away and does not leave any hard to remove residue on the tiles. with this aerosol, you no longer need to get on the floor for hours trying to apply the sealer between the tiles, just spray along the grout lines and do not worry about getting it on the tiles. This penetrating sealer provides a long lasting physical barrier against stains from spills, water and oil on your grout, usually with one coat. The protection lasts up to 15 years depending on surface type and use. This seal also provides a physical barrier against mold and mildew stains on your grout.