Dow Corning 5 compound is a grease like, dielectric compound that is used to make moisture resistant seals for electrical, automotive, aircraft, and marine assemblies. It can also be used to lubricate and seal o-rings, switches, door seals, cable connectors, and battery terminals. It is odorless, has low volatility, good chemical stability and thermal oxidation. - Grease like material containing an inert amorphoussilica filler in combination with selected dimethyl and phenylmethyl silicone fluids. This nonconductive compound is used primarily for applications requiring compatibility with rubber, metal, and plastic.