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From my research on galvanic corrosion(electrolysis) from dissimilar metals on aluminum using steel or stainless bolts, do not use anything with copper in it. I found a product that I’m using now.. Jet Lube Marine Non Metalic Grade Anti Sieze. Got it through Fastenal company. You can google "Galvanic corrosion" or "Electrolysis " and you will find more info than you will want to look at. I run in salt water and fix up outboards that have been used in salt water. A challenge to remove bolts, I use a 50/50 mix of power steering fluild and acetone. Let it soak around the bolt , use a propane torch to heat around the aluminum block and take your time. Reapply the 50/50 mix and it will get sucked into the crevices/threads. Give the bolt head a good smart whack with a steel punch or the like. Be gentle working the bolt loose ,work it both tightening and loosening. You tube has videos of these methods.
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