A cosmetic blackener for most non-ferrous metals. ABC Blackener™ works on aluminum, brass and copper. No special ventilating system required. Should be used at room temperature. May be applied by immersion or brush-on technique. Precision Brand® ABC Blackener™ Kit contains a 1 qt bottle of ABC Blackener™ and a 1 qt bottle of ABC Sealant™. 1 qt of ABC Blackener™ covers 30 to 40 sq-ft, however coverage varies with application technique. ABC Blackener™ products cannot be shipped via air transportation. Precision Brand® ABC Blackener™ 1 ABC Blackener Kit, Liquid Form, 30 to 40 sq-ft Coverage, Chemical Composition: Water, Selenious Acid and Nickel Sulphate, 1 pH, Odorless Odor/Scent