BDR is a safe, non-acid wheel cleaner. It contains “super-charged” degreasers without solvents or glycol ethers. Not only does it remove baked-on brake dust easily, but also ferrous metal particulates, road grime, grease, oil and dirt from all kinds of wheels, including clear coated aluminum, magnesium, chrome, painted and OEM. Just spray on, and rinse off. Wheels look like new! Will not harm plastic hub caps. This highly concentrated (8:1) formula, more than effectively cleans tires also. Biodegradable and non-flammable. VOC compliant. Sizes- 1, 5, 15, 30 and 55 Gallon.