3M 20126 Fiberglass Resin Liquid Hardener

Bondo Fiberglass Resin Liquid Hardener for use with Bondo Fiberglass Resin and Bondo Metal Fill. Used as part of a 2-part system, the liquid hardener is mixed with fiberglass resin to create extremely strong, durable and waterproof repairs. Once mixed, the fiberglass resin will cure in 2 hours. Use this product for interior and exterior home repairs including tubs, showers, sinks, pools, hot tubs, boats, and more.