You can buy some No-Lox from Ideal or Ox-Gard from GB. It'll be in the electricall section at most home improvement and hardware stores.
We use it in the electrical field on aluminum terminals and aluminum cable. It has the consistancy of anti-seize. I've taken panels apart that were installed 40 years ago and that stuff is still on the joints. It's good stuff, a little goes a long way. If you can't find it, some di-electric grease or white lithium is good too.
Chris
