I use the Ford Motorcraft XG12 dielectric grease thats Nyogel 760G. Good lubricant for O rings and threads? - #19 by RobertB
Not sure what the permatrex makeup is but it could be close to the same.
The XG12 was much cheaper than buying the retail labeled 760G grease.
It was sold on BLF at one time. SOLD OUT! -- thank you -- 3 ounces of Nyogel 760G for $12, postage included -- U.S. only