ThreeBond Black Gasket Maker is a one-component, room-temperature vulcanizing (RTV) sealant. A high viscosity product that cures when exposed to air. The cured material has superior adhesion and elongation properties. It is oxygen sensor safe and will not corrode metal surfaces.
ThreeBond supplies various formulations of their RTV to a majority of the OE auto manufacturers worldwide for use on their assembly lines. The Black RTV product is specified in most service manuals by its part number, so you know it meets the specifications required by the big auto manufacturers. You have most likely used the ThreeBond Black RTV already, you just didn’t know it. This is because they supply many different versions under many different names. But the ThreeBond brand name is always the newest formulation with the most updated technology which will meet or surpass the quality of the OE specified version.