Provides waterproof adhesion under extreme conditions. Will not harm most tub surrounds and shower walls. Light tan eliminates adhesive show through. For most plastic, fiberglass, polystyrene tub and showers units to structurally sound drywall, plywood, ceramic tiles, greenboard, and cement backerboard. Not recommended for uses other than tube and shower surround installations, thin-walled and translucent surrounds, use below water line. Using a 1/8" bead covers 30 lineal feet.