Best Lubricant for Locks Northshore: 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. Locksmith Northshore (604) 239-2111 Lubricant Locks Northshore WD-40 WD40 or “Locksmith in a can” is a great product and I have […]