WD-40 freezing point
Junior Member
Joined: Dec 2019
Posts: 1
Likes: 0
For what it is worth, a locksmith friend of mine loves WD-40. He makes lots of money from replacing lock cylinders that have been wrecked by the stuff. I would never put that crap in a lock, if I have a rusty bolt then I use WD-40. Marvel Mystery Oil, or gun lube both are much better. There is also lock oil, I don't remember the name, available.
Joe
Joe
Technical Article Contributor
Joined: Jan 2007
Posts: 10,636
Likes: 264
From: Vernon, NY
I'm a locksmith, and I can attest to seeing WD-40 destroying locks. Especially ones that are heavily used.
The best stuff I use is Locksaver or PoxyLube-200. Both are PTFE lubricant certified by many lock manufacturers for use in their locks at the factory, and even have MIL-SPEC qualifications for field use.
The best stuff I use is Locksaver or PoxyLube-200. Both are PTFE lubricant certified by many lock manufacturers for use in their locks at the factory, and even have MIL-SPEC qualifications for field use.