How to Lubricate a Stiff Lock

A night latch needs two different lubrication products. The interior latch needs oil. Add a few drops on and around the sliding bolt, to the base of the knob, and to the “snip” switch.

The exterior cylinder needs a dry lubricant and should never have oil applied. Oil can cause a gummy residue, which eventually stiffens or stops the cylinder from turning. Instead use a graphite powder, which is applied using a narrow application spout provided with it. Puff the powder into the keyhole and slide the key in and out to disperse the powder through the cylinder and tumbler parts.

Apply a little lubricant oil on the sliding bolt and into the keyhole; just a few drops is sufficient.

The padlock cylinder should be lubricated with a dry lubricant such as graphite powder. Tip: Lubricating a lock cylinder with a dry graphite powder will keep the delicate mechanism working properly. This is especially important for locks that are exposed to wet conditions and freeze/thaw cycles. The more mechanical type locks such as interior locks and latches may be oiled or greased as normal.

The shackle mechanism of the padlock should be oiled.