[Poser]

I use Caterpillar high-temp anti-seize on just about everything

part number 4C-5599.

I have used this on all spark plugs, steel or aluminum heads, and have gotten it on the "buisness end" of it, and not had a problem.

I have used it on wheel cylinder adjusting screws for years, and not had any issues either.

Good luck!

-Steve