Is WD40 Good for Door Locks?

Is WD40 Good for Door Locks?

wd40 locks

Is WD40 Good for Door Locks?

Even though it’s widely used for many different things, WD40 is not suggested to be used on any door locks. You might think it would be good to use when you’ve got a stiff door as you can use it for almost everything, however, the effect it could have on your door locks and the damage it could cause, makes it unsuitable for use. There are other products similar like WD40 Gel Lube No Drip Formula and Silicone that you can use instead and would have much better results!

In this guide, we breakdown why WD40 isn’t good for door locks and what you can use instead.


What is WD40?

It’s a multi-use product meaning that can be used to remove rust from any metal surface, loosen rusty fasteners, lubricate moving components and remove duct tape from practically any surface, but you should not on use it on lock doors.

People generally think that WD40 is made of different components that serves as a lubricant. However, this isn’t true, it’s actually a water displacing solution which is actually how the product got its name. (Water Displacement 40th formula)


Why is WD40 Not Suggested to Use on Door Locks?

With all of the chemicals within WD40, although it’s generally used as a lubricant, the chemicals actually end up drying out the actual lubricant the lock already has – which would only make a stiff lock stiffer or sticky!

Likewise, it can attract dust and dirt into your locking mechanism and lock which will affect how your lock works.


Can you use WD40 on wooden doors?

WD40 is safe to use on wood, so the technical answer is yes. However, you still won’t be able to use it on the metal door lock attached the wooden door. You can use WD40 to remove scuff marks from your wooden door however and you’ll need to wipe down the door with a damp cloth after using WD40 on a wooden door.


Can you use WD40 on a UPVC Door?

WD40 can be used on a UPVC door? We suggest only using WD40 to remove marks and scuff or to wipe clean any rubber seals your UPVC doors might have. You will need to wipe your UPVC door down with a damp cloth after using WD40. You should not use it on any of the metal lock components or when trying to fix a uPVC door mechanism.

To find out more about maintaining your UPVC door, check out our UPVC Door Guide.


What is the Best Lock Lubricant to use instead of WD40?

If you are looking for a lubricant to use on a door that had become stiff, there a few types on the market you can use;


Dry PTFE Lubricants

Dry PTFE Lubricants are better for doors as they are a dry lubricant that will keep things running smoothly. It does not attract dirt, dust, or oil and will prevent corrosion and doesn’t leave a residue.


Houdini Lubricants

Houdini lubricants are a non-petroleum, which makes it perfect to use on almost anything while serving as a great lubricant. What makes it unique is how long it lasts with door locks by avoiding any rust for a long period.


Can you Oil your Door Lock to Lubricate it?

Whilst oil is something you may have in your garage and is often known for its lubricating properties, it’s not suggested to pour oil directly to your keyhole. If you need a quick fix while you organise another solution, like calling out a local Locksmith, we suggest oiling your key with a very small amount of oil before putting it inside the lock to help lubricate it.

It’s also worth noting you should avoid using olive oil when lubricating your key, especially if you live somewhere cold or if it’s the winter as it can encourage things like hair, pocket lint, or dust to gather in your lock over time.


How Can you Fix a Stiff Door Lock?

There are several ways you can fix a stiff door lock, without damaging it in the long run. If you are having continuing issues with your door being stiff or your door won’t open, you may need to consult a Locksmith to fix the underlying cause.  However, you could try.


Use Graphite Powder

This comes in a tube which makes it very easy to apply to your door locks, as you don’t need a lot. You can just dip your key in slightly for a light coverage and then slide your key in and out of your lock gently to get it into your lock.

Top Tip: If you don’t want to use graphite powder, a pencil produces similar results!


Lubricating the Lock

Apart from all the dos and don’ts of lubricating products as mentioned above, getting a good lock lubricator is actually one of the best ways to fix a stiff door lock!


Should you Lubricate your Door Locks?

Lubricating your door with the correct lubricant will be beneficial to the maintenance of your door. The hinges of your door receive heavy use, so lubricating them regularly will stop them from becoming stiff. It can also help prevent your door and lock from rusting