Homax Tile Guard Tile Grout Coating makes your grout look new again without having to re-grout. Just apply Tile Grout Coating to grout lines allow to dry and wipe off. This coating actually re-whitens your grout to make it look like you just re-grouted! Our unique formula deeply penetrates as it dries. Because this coating forms a durable bond with porous grout it is suitable for use on floors and in showers. Restore your grout lines to original whiteness and guard against soiling and mildew stains in one easy step.