Graphite in Locks? ...not good sometime
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.
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