Permatex Super "300"
seems to be formulated for exactly
this type of application. (re-sealing plug caps)
From Permatex webstie: Non-hardening sealant designed to resist heat transfer fluids such as oil or antifreeze.
Does anyone have experience with Super 300?
A few permatex products were mentioned earlier in this thread. (Specifically Permatex #2
and Permatex Indian Head
What are the similaraties/differences between Super 300, #2, and Indian Head?
P.S. - Congrats to CitizenPete on what sounds like a resolved issue!
I am a few months behind . . soaking the plug caps in liquid wrench. Will attempt removal tomorrow!