Red Green wrote:
Recently had to have a key made for van door lock I had no key for.
Locksmith lubed the lock and it wasn't graphite based. I asked why and he
said because of the high humidity here in the mid-south graphite is NG.
When combined with moisture it hardens like cement. Have to take his word
for it. Well established locksmith. Not some matchbook cover graduate
working out of garage and car.

What did he use? WD-40!

...and the WD-40 thread war is on again :-)


Just an FYI. Just a messenger here.

Graphite is absolutely not hygroscopic so it doesn't "combine with
moisture" at all. Anyone can demonstrate this by attempting to mix
graphite with water.