Precision Brand® Tool Black® Liquid Kit contains one pint each of Tool Black® Liquid, Prevent®, and Metal Polish/Cleanser. One pint of Tool Black® Liquid covers 25 to 35 square feet, however, coverage varies with application technique. Fast, inexpensive alternative to black oxide. Imparts a tough, dull black protective finish to ferrous metal parts. Ideal for prototypes, repair parts, and general machine work. The liquid solution is used on small immersible parts. Should be used at room temperature as a cold application.