• Duraglas® Body Filler is the original fiberglass reinforced automotive body repair filler  • Formulated with short-strand fiberglass fibers, Duraglas® provides ultimate strength and durability on rust-outs, holes, tears and cracks  • Ideal for use on metal and fiberglass panels  • #1 Short-strand fiberglass filled body filler  • Reinforced for superior strength  • Use with fiberglass cloth for large repairs  • Rustproof  • Waterproof