Going beyond the stuff available at the hardware store, Boeshield was developed by the aviation industry giant Boeing, as a protective coating that penetrates deeply into fasteners and fixtures, displaces moisture and attacks corrosion, and then drys to a clean waxy film. Not only that, but it will help loosen rusted parts and will not harm paints, plastics, or vinyl. Useful for all the places you’d use more pedestrian formulations like clutch cables, pivots and linkages, and even battery terminals and other wiring that may be exposed to the elements. Good stuff. 4 oz.