Heavy-duty cleaning and degreasing powder. Non-caustic formula dissolves grease, rust, paint, carbon, gum, resin, oil, and dirt. Strong enough for use on engines, alternators, starters, transmissions, and carburetors, but safe enough to use on baking equipment, aluminum trays, fryer parts, and other metal items. Safe on ferrous and non-ferrous metals, including aluminum, zinc, brass, and their alloys. During the cleaning process, a transparent rust inhibiting film is formed on metal surfaces to prevent rusting and pitting. The film is completely clear, undetectable by touch or sight, and will not interfere with paints, coatings, or adhesives.