Well that's what the tube says it is........"gasket maker". I've never used any of the high temp silicones solely as the gasket between the intake and the head, as I've always been able to just buy the correct gasket from Felpro. But Felpro doesn't make anything for a 4.0L crossflow head from Australia, and the stock gasket I have would need opening up to match the now bigger port. Although I have a gasket, I only have one. It is the thickness of the cardboard backer that comes on a legal pad and again, I only have one. If for whatever reason, I need to take the intake off after installation, I'll be right back here, wondering if I can just forego the paper gasket, and go straight silicone. I know that I'm gonna do that on the exhaust manifold flange, I'm going to use ultra copper there, as it has always been my practice on headers, but the intake is the reason for the question. I'm putting that thing on for real today.