Best Lock Lubricants for Locksmiths Review: WD40, TriFlow and Lock Saver | Mr. Locksmith Video. For further into go to http://mrlocksmithtraining.com/
WD40 or “Locksmith in a can” is a great product and I have opened hundreds of lock where the customer had a key that didn’t work and I would lightly spray the key hole and the key would work (Note: I would usually rekey or replace the lock after opening). If I can not pick a lock I will spray the lock with WD40 and it will then pick open. I have had no luck with other lubricates, It may be psychological but it works.
Tri-Flow Lubricant is a superior, light viscosity lube that allows for deep penetration into hard to reach moving parts. The aerosol spray uses high-grade petroleum oils that provide optimum lubrication under extreme temperatures (-60 to 475°F) and humidity. I use Tri-Flow after I rekey most domestic locks.
Lock Saver is a dry lubricant and will not attract dust and is recommended for most High Security Locks.
Never use oil because it will attract dust and grim.
Graphite is the traditional material for lubricating pin tumbler locks, however, I do not like using it. My Dad used it profusely in locks and had a large tin of it on his work bench. I consider graphite old school because locksmiths today have a great selection of superior lock lubricants available.
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