How Long Does WD40 Last? [Ultimate Guide]

So, you’ve got yourself some WD40 stored in your house, and you’re wondering – how long does WD40 last? That’s precisely what you’ll learn in this article today.

WD40 is said to have no definite expiration date. However, its effectiveness does diminish over time, so it’s said that it can last for around five years from the date of production, according to WD40. WD40s shelf life can increase if you properly store and use it.

Now, let’s dig into more detail.

WD40 lasts around five years under proper storage conditions.

However, it is essential to note that the efficacy of WD-40 does start to diminish over time.

This is because the product is made up of a combination of oils, solvents, and other ingredients that can start to break down and separate over time. When this happens, the product loses its original lubricating and rust-fighting abilities.

With proper storage and regular checks for effectiveness, WD-40 can last up to five years.

So, now that you know how long does WD40 last. How do you store it?

How to Store WD40?

To extend the life of WD-40, storing the product in a cool, dry place and keeping it away from extreme temperatures is essential.

Keeping the product in its original container and ensuring the lid is tightly closed after each use is also essential. This will help to reduce the amount of air that gets into the container and will help to reduce the rate at which the product breaks down.

You’ll also need to ensure the can is upright and stays upright and the cap is securely fastened when stored.

It’s optimal to store it in a place with good ventilation like a garage or shed – and to avoid potentially high-temperature areas like the attic.

Can You Use WD40 After Five Years?

WD40 does not technically expire, but it may deteriorate over time. WD-40 is a petroleum-based product, so its chemical composition is prone to breaking down over time.

This means that it may become less effective or even less safe to use after a certain period of time.

The best way to determine if your WD-40 has gone bad is to check its smell and consistency. If it smells off or has separated into different layers, it may no longer be safe to use. In this case, it’s best to dispose of it and buy a new can.

If it meets those two requirements, it’s probably okay to use – although, if it’s been over five years, it may not be as effective as you’d think it is.

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How Long Does WD40 Last on The Object?

WD40 can last up to a year on an object depending on the type of material.

For metal surfaces, WD40 should be applied at least every three months. If the metal is exposed to harsh environmental conditions, it should be re-applied more frequently.

For plastic surfaces, WD40 can be applied every six months or so. This is because the plastic surfaces are more resistant to rust and corrosion than metal surfaces.

For wooden surfaces, WD40 should be applied once a year. This is because wooden surfaces are more susceptible to moisture and weathering.

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Final Words

So, how long does WD40 last? As a general rule of thumb, it lasts five years under proper storage conditions.

If it still smells normal and does not separate into different layers when spraying after five years, you can still use it. It’s recommended to use it to see if it works every couple of months.

If you have any questions of concerns about WD40, you can check out WD40 manual or leave them in the comments below. Happy prepping!

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