Dow corning 2793695 4 electrical insulating compound 100g dow corning 2793695 dow corning dc 4 is a grease like material containing an inert silica filler in combination with selected polydimethyl silicone fluids it provides a moisture proof seal for aircraft automotive and marine ignition systems and spark plug connections it can also be used on disconnection junctions in electrical wiring systems and on electrical assemblies and terminals dc 4 can be used as a seal and lubricant for ca