The best lubricant for door locks is a dry lubricant, such as graphite powder or PTFE lubricants.
Why Choose Dry Lubricants?
Using the correct lubricant is crucial for maintaining the intricate mechanisms inside a door lock. Dry lubricants are highly recommended because they do not attract dust and dirt, which can accumulate and cause damage or jamming over time.
According to the reference:
- Dry lubricants like graphite powder and PTFE lubricants are best.
- Oil-based products are not recommended because they can attract dust and dirt. This accumulation can damage the delicate internal components of the lock.
Recommended Lubricant Types
- Graphite Powder: A traditional and effective dry lubricant. It coats the internal parts, allowing them to move smoothly without attracting debris.
- PTFE Lubricants: Also known as Teflon-based lubricants. These create a slick, dry film inside the lock.
Lubricants to Avoid
- Oil-Based Lubricants: Such as WD-40 (which is more of a penetrating oil than a long-term lubricant), motor oil, or cooking oils. These attract dirt and can gum up the lock mechanism.
- Grease: Similar to oil, grease will attract and hold onto dirt, leading to blockages.
Applying Lock Lubricant
- Clean around the keyhole if possible.
- Apply a small amount of the dry lubricant directly into the keyhole. For graphite, a puffer tube works well. For PTFE sprays, use the nozzle extension.
- Insert your key multiple times, turning it gently to work the lubricant into the tumblers and other moving parts.
- Wipe away any excess lubricant from the key and the lock face.
By using a dry lubricant like graphite or PTFE, you can help ensure your door lock operates smoothly and reliably for years to come, avoiding the common issues caused by dirt and grime attracted by wet lubricants.
