Bondo™ all-purpose fiberglass resin is suitable for a range of repairs and improvement projects inside and outside of the home and garage. Part of a brand that is well known for auto repair, this fiberglass resin works with fiberglass, wood, concrete and more. It is 100% waterproof and makes an excellent sealer use it for repairing showers, tubs, sinks and watercrafts of all sizes. For repairs involving large holes, cracks or damaged surfaces, it works easily with layers of Bondo™ fiberglass cloth, mat or cloth tape. The two-part resin cures in 2 hr. It is also compatible with almost any paint system or gel coat. Bondo™ all-purpose fiberglass Bondo™ fiberglass resin liquid hardener is included with the resin. Made with the same resin used to build many boats, Bondo™ all-purpose fiberglass resin is 100% waterproof for a versatile range of projects such as repairing tubs, showers, sinks, pools, hot tubs and boats. Replacing damaged tubs or shower units or paying someone to repair your boat can be expensive. This resin lets you make durable waterproof repairs yourself, in very little time and at much less cost. When used with Bondo™ fiberglass cloth or mat, Bondo™ all-purpose fiberglass resin makes for extremely strong and durable repair in projects large and small. When the resin and the included liquid hardener are mixed, a reaction occurs which allows the resin to chemically bond to the surface you are repairing.