Can be used to remove almost all common soils including grease, oil, wax gum, dirt, dye, etc. Can be used on metal, plastic, rubber, porcelain, concrete and wood surfaces safely and effectively. Contains a rust inhibitor and can be used to remove lubricating oil and similar soil from tools, parts, engines, etc. Without danger of rusting or corrosion. Contains special nontoxic solvents, synthetic wetting agents, and water softeners; does not contain caustic soda or caustic potash.