Rolls Royce, or some British firm associated with them, develop Hylomar during WW2 to seal up intake gaskets on thier liquid coooled aircraft motors. I use it, it is a great gasket sealer You need to use a very thin coat of it on both sides of the gasket and a very thin coat on each of the mating surfaces on the heads and intake, not thick at all


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)