Precision Brand® ABC Blackener Kit contains a 1-quart bottle of ABC Blackener and a 1-quart bottle of ABC Sealant. 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. One quart of ABC Blackener covers 30 to 40 square feet, however, coverage varies with application technique.