Organic salt formula is non-flammable and is safer than traditional acids. Removes heavily-encrusted corrosion, rust, calcium, lime, tarnish, grease, oil and water stains. Will not dull or haze aluminum. Perfect for use on fuel tanks, mag wheels, Alcoa wheels, diamond plate, framing, step plate, engine parts, rusted steel and water-stained windows. Safe for use on aluminum, glass, fiberglass, stainless steel, painted and enamel finishes, tile, brass, copper, acrylic and plastic. Not for use on chrome. 16 oz spray bottle.