Duraglas(R) 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 fillerReinforced for superior strengthUse with fiberglass cloth for large repairsRustproof. Waterproof.COLOR: Blue-green (as packaged)MIX: 2% by weight (50:1 ratio) with supplied cream hardener.SUBSTRATE: Metal. Aluminum. Fiberglass. Wood. Masonry. Concrete.SUGGESTED USE: Rust repairs. Repair cracks and holes in fiberglass. Use on weld areas and bond seams for automotive and marine repairs.TOP COAT: All-Metal (for a completely waterproof repair). Finishing Putty.US Chemical & Plastics 24030 Duraglas(R) Fiberglass Filled Filler 1 Gallon