RainGuard Stone Sealer is a penetrating water repellent that dries down to a clear, invisible finish. It has a non-yellowing, low odor, zero VOC, and non-toxic formula, making it safe for people, pets, and plants. It is formulated to not be affected by weathering, salt, dirt, freezing temperatures, UV light, and wind-driven rain, among many other damaging elements. Stone Sealer dries down to a clear, invisible finish that does not change the surface texture or color. Ideal for use on uncoated/unpainted, vertical/horizontal, interior/exterior stone surfaces such as: stone floors, walkways, patios, fences, pool decks, and any other porous stone surfaces.