An industry proven penetrating oil that has no equal. A scientific discovery reduces the surface tension so that this amazing solvent creeps into openings as small as one millionth of an inch. Use AeroKroil to loosen frozen nuts, bolts, studs, pulleys, shafts, bearings, pipes, valve guides, frozen engines, fly wheels, and sprockets. The low viscosity of gun lubricating oil soaks deep into gaps to break the bond that holds stuck parts together.