I use Permatex refined blend of aluminum, copper and graphite lubricants.
Permatex 81343 Anti-Seize Lubricant $3.99 at about any Auto parts outlet
Salt, corrosion and moisture resistant, this lubricant is ideal for marine use
Prevents galling, corrosion and seizing and to assure easier disassembly
Suggested Applications: For easy removal of spark plugs, cylinder head and exhaust head bolts
Temperature range: -60F to 1600F.....
and I might add.... C&B nipples
What is more, I bought the tube about 1 year ago....cause I have lost the tube I used some 15 years or more
others usage may vary....just save to say, a tiny dab X 6 each disassembly , the tube will last years...