This Burndy P8A PENETROX A compound is an 8 oz. squeeze bottle of electrical joint compound for a proper electrical connection between metal parts such as conductors. It is an oxide inhibiting compound for preventing galvanic corrosion and enhancing the connection in electrical joints. It can be used in aluminum to aluminum, aluminum to copper, and aluminum to conduit applications. It remains workable when stored in a dry environment under 100 degrees F and is Underwriter s Laboratories UL listed to 600 V, Canadian Standards Association CSA certified, and Restriction of Hazardous Substances RoHS compliant. This joint compound is suitable for use with conductors, telescoping aluminum tubing or other antenna, and grounding parts.Burndy manufactures cable connection and management products. The company, founded in 1924, is headquartered in Manchester, NH.