Works on porcelain and fiberglass bathtubs Great alternative to bath mats Slip resistant; easy to clean Dries in 20 minutes or less Maximum durability and strong adhesion The ONLY non-slip white spray for Fiberglass found on the market This product comes in an easy to apply aerosol can. Long lasting and Slip-Resistant Epoxy Coating. Can be used in bathtubs, showers, boats, stairs, etc. Will work on virtually any surface. Each can covers up to 15 Sq Ft. Can be used indoors or outdoors.