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Without exception, I use high temp silicone on all paper gaskets for three reasons. 1) it seals better than dry and 2) the gasket peals off in one piece when the parts are taken off next time and 3) it acts as a lubricant during assembly and lets the gasket move slightly during the assembly process. I use a very THIN coating, using two fingers and smearing the sealant as thin as I can get it on both side of the gasket. If you do that it leaves very little on the metal parts to clean up and even then it usually just rolls off.
I wet sanded my chain covers on a piece of glass and found that I exposed more problems than I fixed. Imperfections in the casting required the use of a sealant.
Lindy
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