Permatex 14A is a thread sealer with Teflon
Permatex 2A is a general purpose sealer (resin based).
Loctite 565 PST is a high grade sealer for SS fittings.
DO NOT use teflon tape!
Keep the paste products back from the end of the fitting at least 2 thread turns. Even slippery Teflon will eat up a pump.
-John