I used the International gasket maker. its a greay silcone and smells of amonia real bad. if want something to seal I would this stuff, never had a leak. This stuff is strong! Its used on the DT444 motors for there oil pan gaskets and when its comes time to remove the pan you usually have to find the biggest hammer in the shop. great stuff, I used it because I didnt want any vacuum leaks.
Mark Walke