Aluminum Pre-Clean - Organic Salt formula. Non-flammable. Safer than traditional acids. Instantly removes heavily-encrusted corrosion, rust, calcium, lime, tarnish, grease, oil & water stains. Unmatched for its performance on aluminum (will not dull or haze aluminum), it is also safe for use on painted & fiberglass surfaces. Dot Classifications: Non Regulated. - Safe on: Glass, Aluminum, Fiberglass, Stainless Steel, Painted & Enamel FInishes, Tile, Brass, Copper, Acrylics, Plastic - Perfect for use on: Fuel Tanks, Mag Wheels, Alcoa Wheels, Diamond Plate, Framing, Step Plate, Engine Parts, Rusted Steel, Car Wash Bays and Walls, Snowmobile Tunnels, Fiberglass Boats, Outboard Engines, Outdrives, Water-stained