Dynatron Fiberglass Resin is a durable, professional-quality polyester resin for repairing and restoring a range of materials including metal, wood and fiberglass in auto body repair. This resin accepts most auto and marine paints, including gel coats. With Dynatron Fiberglass Mat and Fiberglass Cloth, it is ideal for repairing large rust holes in metal and repairing fiberglass parts.Use Dynatron Fiberglass Resin to repair and restore fiberglass, metal or wood. Dynatron Fiberglass Resin is moldable and shapeable. The resin applies easily into properly prepared fiberglass and other substrates – it can be used to cover holes left by rust-outs and even to stabilize and repair rotted wood. Waterproof resin hardens fast and accepts most auto paint and marine topcoats including gel coatings.