WD-40 gets under water, drives it off and keeps it off. A non-conductor and can be used to dry out electrical and electronic equipment. Silicone-free, there's no messy, gummy residue. Removes grease, grime, tar, gum, crayon, water deposits. Lubricates an d protects against moisture and corrosive elements. Frees sticky mechanisms and penetrates to free up frozen or rusted metal parts and fasteners. Keeps control and linkages working freely, too.