Both sides. If you initially stuck the gasket down using the Gasgacinch like I mentioned before then you would have Gasgacinch on one side and Ultra Grey on the other, and then a suitable amount in any corner.
I prefer Ultra Grey over the other silicones because it really likes to stick to itself. Engines that I have taken apart that previously had clear, blue, or red silicone usually has strings of that stuff loose and either stuck in a passage or up against the oil filter screen. The Ultra Grey bonds well enough to itself that it stays in place.
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 2+2 survivor AC auto -- 1965 Catalina Safari Wagon in progress.
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