Devcon (90216-6PK) Fiberglass, Porcelain and Plastic Bathtub Repair Kit, (Pack of 6) Perfect for repairing small holes and cracks in fiberglass, porcelain, and plastic Kit mixes to a white color; can add the pigment for almond/bisque color matching Resistant to water Working time: 4-5 minutes, Set time: 20 minutes, Full cure: up to 24 hours Suggested Applications: Repair nicks in toilets, sinks, tile surrounds, spa tubs, figurines, bathtubs, shower stalls and more; for use on porcelain, fiberglass plastic and ceramic materials