Best Lubricant for Locks | Mr. Prolock: Graphite powder was the preferred lubricant for locks, however, Modern Lubricants are a superior, light viscosity lube that allows for deep penetration into hard to reach moving parts.  Mr. Prolock: (604) 259-2953 Lubricant Locks Mr. Prolock WD-40 WD40 or “Locksmith in a can” is a great product and […]