I just noticed something else my brain had just been skipping over and filling in the blanks. You might want to distinguish between silicone (the polymer) and silicon (the element). The words often get used interchangeably, but I would guess only the former applies here.

I do have more questions though, Matt, if you've got the time. I know nothing about film strength properties of different greases. Is a purpose built dielectric grease based on a silicone grease? I had thought they were very closely related, and have seen silicone grease used extensively for the purpose of protecting contacts from oxidation. I've done it extensively myself with no ill effects, but perhaps I've just been lucky?

I've seen silicone grease defined as a silicone oil thickened with a lithium soap, and silicone paste defined as a silicone oil thickened by other inert fillers. Perhaps that's what I've been missing? Would a silicone oil thickened with a lithium base result in the type of silicone grease that has a film strength which would be bad for use on electrical contacts?

My go-to has always been Super Lube. It definitely does a great job protecting contacts, and I've rebuilt a lot of oxidized antique automotive switches and whatnot over the years with it. It's always worked for me, but I'd hate to think I've been adding contact resistance all this time. Perhaps I need to start paying more $$$ for those smaller tubes...