All I ever use is Bostic Antisieze.It is copper based with molydisulfide.Has a silver gray color.I never sieze a plug.If it works on high pressure steam fittings,it will work on anything.The only drawback is it's messy to clean up.I put a patch on my breach brush and screw it in and out a time or two.The Moly will actualy penetrate into the metal,giving lasting protection.I have been a maintence mechanic for 36 years,and never had the stuff fail.Comes in 8oz can with an applicator brush.One can will last a lifetime.

Charlie Correct spelling is Never-Seez