Evercoat Fibreglass 1189 Tiger Hair Long Strand Fiber Reinforced Filler - Quart Uses a unique blend of high strength polyester resin and long strand bulk fibers for maximum strength and consistent performance Provides maximum impact and crack resistance in bulk filling applications and when bridging over shattered and heavily damaged fiberglass and metal Waterproof and rustproof Offers many alternative applications such as filling rotted wood, damaged plaster, and filling cracks in concrete and masonry