OBB1259 Features: * Works in minutes * Acidity: 2.50 pH * Odor: Solvent * Specific Gravity: 1.1390 * Applicable Materials: Aluminum * Removes: Oxidation, Dirt * Testing and approvals: Color/Finish: * Color: Blue * Not for use on glass, galvanized, anodized, cadmium coated, or painted surfaces. May discolor 2000 Series aluminum alloy.