How to Prevent Outdoor Locks from Freezing

Co-authored by Ryaan Tuttle

Last Updated: September 25, 2024 References

Frozen locks are an annoying fact of life during the winter. You definitely don’t want to be left out in the cold, so naturally you want to do anything you can to prevent your outdoor locks from freezing on you. Luckily, there are lots of ways to do this! Whether you’re trying to protect door locks, car locks, or padlocks, these tricks should prevent you from getting locked out this winter.

1

Spray the lock with WD-40.

Download Article

This lubricant keeps water out of any lock to prevent freezing. If you’re expecting a cold snap or snowstorm, squirt some WD-40 into the lock. For cold winters, spray all locks 1-2 times per week to keep them in good, working order. ^{[1]
X
Research source}
- This only works if you get the lubricant inside the lock. Get the nozzle right up to the lock opening and give it a good squirt.
- You could also use this trick for combination locks. Spray any openings so the lubricant gets into the lock mechanism.

2

Try graphite spray.

Download Article

Graphite is similar to WD-40, but doesn't have the same harsh odor. If you want a lock lubricant that won't stink up your car or home, then this is a great choice. ^{[2]
X
Research source}
- Graphite tends to work a bit better on car locks, so give this a try if WD-40 hasn't done the trick for you.
- Like with WD-40, spray your locks regularly with graphite during the winter to prevent freezing.

3

Smear some petroleum jelly on the lock.

Download Article

Petroleum jelly blocks moisture from getting into the lock. Smear some onto your key, then insert it into the lock and shake it around a bit to coat the inner lock mechanism. Repeat this a few times throughout the winter to keep the lock lubricated and moisture-free.
- This trick is a good replacement if you don’t have WD-40 or a similar lubricant.
- This trick won't work for combination locks, since you can't use a key to coat the interior.
- Petroleum jelly could also loosen the lock if it does freeze. Coat the key in it and slide it into the lock to see if you can open it.

4

Spray compressed air into the lock.

Download Article

The air blasts moisture out of the lock. Use a compressed air can, like you’d use to clean your computer screen. Put the nozzle right up to any lock and give it a good spray. With the moisture blasted out, the lock is less likely to freeze or seize up. ^{[3]
X
Research source}
- This is only a short-term solution, since it doesn’t actually prevent moisture from getting into the lock. It’s best to follow-up with a lubricant or covering so moisture doesn’t get back inside the lock.

5

Cover the lock opening with a magnet.

Download Article

This simple trick can keep the lock dry when it’s cold. Get a strong magnet and stick it to the lock opening. Make sure it covers the entire opening so moisture can’t sneak in. When you’re ready to open the lock, just pop the magnet off and slide the key in normally. ^{[4]
X
Research source}
- This is a good way to follow-up with a compressed air treatment, since it stops more moisture from getting in the lock.
- It’s also a good trick for car locks. You can keep the magnet in your glove box and pop it onto your lock when you know it’ll be cold.

6

Wrap padlocks in socks.

Download Article

Use a thick sock, preferably wool, to prevent water from getting inside. Slip it over the lock and twist it so it’s tight and snug. Then tie the sock into a knot so it doesn’t fall off. ^{[5]
X
Research source}
- This works best along with another method, like lubrication. The sock alone might not be warm enough to stop water from freezing, especially in a cold area.
- Make sure the sock is totally dry! If it gets wet, it could freeze around the lock and then you'll really be out of luck.
- This trick won’t work for door or car locks. The sock has to wrap around the lock entirely to keep it warm enough.

7

Switch to weatherproof padlocks.

Download Article

Some padlocks are specifically designed to resist freezing. Look for a high-quality weatherproof lock, preferably with a plastic casing that blocks moisture. These can resist the cold better than regular locks. ^{[6]
X
Research source}
- Weatherproof locks aren’t guaranteed to not freeze. They just resist freezing better than normal locks.

8

Dip your key in hand sanitizer to melt ice.

Download Article

You’re not out of luck if your lock does freeze. Simply rub some hand sanitizer on the key and slide it into the lock. Shake it back and forth a few times, then try to turn the key. The alcohol in the hand sanitizer should melt the ice and free the lock. ^{[7]
X
Research source}
- There are also lock de-icing sprays that you can use to loosen a frozen lock. They work a bit better, but are more expensive.

Expert Q&A

Search

Add New Question

Question

What can I use to prevent my lock from freezing?

Ryaan Tuttle
Home Improvement Specialist
Ryaan Tuttle is a Home Improvement Specialist and the CEO of Best Handyman, Inc. in Boston, Massachusetts. With over 17 years of experience, he specializes in building home service businesses, focusing on creating scalable and efficient brands. With the help of his global team, the companies have achieved over 10+ million in sales and received recognition through magazine features, and enjoy partnerships with wikiHow and Jobber field service software. Boston Magazine and LocalBest.com have named Best Handyman Boston the Best Handyman in Boston. Ryaan holds Construction Supervisor and Home Improvement Contractor Licenses.

Ryaan Tuttle

Home Improvement Specialist

Expert Answer

You can spray WD40 or lithium spray on your door lock. It will help to loosen the door lock and also prevent it from freezing.

Thanks! We're glad this was helpful.
Thank you for your feedback.
If wikiHow has helped you, please consider a small contribution to support us in helping more readers like you. We’re committed to providing the world with free how-to resources, and even $1 helps us in our mission. Support wikiHow
Yes No

Not Helpful 19 Helpful 2

Ask a Question

200 characters left

Include your email address to get a message when this question is answered.

Submit

Tips

If you can, try to locate your locks in the sun. If your car lock freezes a lot, try to park in a sunny spot.

Thanks
Helpful 0 Not Helpful 0
It helps to keep some de-icing spray around at all times during the winter, especially in your car. This will help you in a pinch if your lock does freeze.

Thanks
Helpful 0 Not Helpful 0

Submit a Tip

All tip submissions are carefully reviewed before being published

Name

Please provide your name and last initial

Submit

Thanks for submitting a tip for review!

Warnings

Do not pour hot water on the lock to defrost it! You might melt the ice in the short term, but all that water you just poured into your lock will be frozen solid before too long. ^{[8]
X
Research source}

Thanks
Helpful 0 Not Helpful 0
Don’t try to open a frozen lock by turning the key very hard. You could break the key off, and then you’ll have an even bigger problem on your hands. ^{[9]
X
Research source}

Thanks
Helpful 0 Not Helpful 0

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

Log in

How to Prevent Outdoor Locks from Freezing

Steps

Spray the lock with WD-40.

Try graphite spray.

Smear some petroleum jelly on the lock.

Spray compressed air into the lock.

Cover the lock opening with a magnet.

Wrap padlocks in socks.

Switch to weatherproof padlocks.

Dip your key in hand sanitizer to melt ice.

Expert Q&A

Tips

Warnings

You Might Also Like

References

About This Article

Did this article help you?

Quizzes

You Might Also Like

Featured Articles

Trending Articles

Featured Articles

Featured Articles

Watch Articles

Trending Articles

Quizzes

Explore Categories