AIR FILTER CLEANER spray-on is a purpose specific foam and fabric air filter cleaner. Highly effective emulsion formula contains no caustic chemicals and easily washes out with water. Removes heavy filter oils, grease and other contaminants. Rated #1 by Dirt Rider magazine as Best Overall Air Filter Cleaner! CAUTION May cause some painted surfaces to discolor! Do Not use on plastic or Lexan® windshields! Flammable!