Bondo metal reinforced filler is easy to use, yet exceptionally strong for repairing and rebuilding metal, fiberglass and more. Reinforced with aluminum, this filler mixes quickly (hardener is included), cures fast and stays very strong, it won’t rust and it can be drilled, anchored or tapped for non-structural repair. It has a metallic appearance, great for a range of uses.Reinforced with aluminum extra strength in an easy-spreading fillerFast-dry formula allows for sanding in as little as 20 minsExceptionally strong, can be drilled, anchored or tapped for cosmetic repairsProvides a metallic appearance that won’t rust