Utility Wonder 40-2510 12oz Aerosol DGT Water Soluble Foaming Degreaser Just spray it on, let sit for five minutes & wash off with water. Perfect for greasy oil burners, motors, engines, air-conditioning equipment and all hard-to clean parts. Non-Flammable Caustic Free, Non-Corrosive, Heavy Duty Foaming Degreaser REPLACES SOS HDD-1