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If you've ever stored anything outdoors, you know how frustrating it can be to open up your storage and find everything inside soggy and water-logged.

drenched in water meme

Your stored away cushions when it rains

So, if you want to keep your stuff dry (and your sanity intact), you'll need to take some extra steps to make your outdoor storage box truly waterproof.

Most outdoor storage boxes are advertised as "water-resistant," which is definitely NOT the same as ‘waterproof’.

BUT WHAT THE HECK IS THE DIFFERENCE??

Water-resistance means that a material or product is able to resist the penetration of water to some degree but may not completely prevent water from entering.

On the other hand, waterproof means that a material or product is impervious to water, and no amount of water exposure will cause it to allow water to pass through.

In other words, something that is waterproof will always keep water out, while something that is water-resistant may eventually allow water to penetrate it.

Okay, so what can be done?

In this article, we'll explore some tips to help you make your outdoor storage box truly waterproof.

#1) Product Material Matters

First things first, let's talk materials.

If you're serious about waterproofing your storage box, you're going to want to avoid wood, particleboard, and other porous materials like the plague.

particle board damage from water

Instead, opt for plastic, metal, or resin. Not only are these materials naturally resistant to water, but they're also a lot easier to clean than wood, which tends to absorb moisture and dirt like a sponge.


Plus, you don't want your storage box looking like it's been through a woodchipper after a couple of rainy seasons.


#2) Seal All the Seams

It's time to get down to business.

The seams of your storage box are one of the most vulnerable areas when it comes to water intrusion.

To make your box waterproof, you'll need to seal all the seams with a high-quality waterproof sealant.

applying sealant to crevices

The last thing you want is for water to seep in through the cracks and ruin your stuff!

So, look for a sealant that is specifically designed for outdoor use and can be applied to the material your storage box is made from – Like this one here!

A fair warning: This may not be the most glamorous task (since it can get a bit messy applying the sealant), but it's essential if you want to keep your storage box bone dry. Also, wear some latex gloves as you apply the sealant.

#3) Use Weatherstripping

Weatherstripping is the next great way to seal any gaps or cracks in your storage box that may allow water to seep in, especially around the lid.

Apply weatherstripping to the edges of the lid and around any other openings, such as handles or hinges (if applicable). This will create a tight seal and help prevent water from getting inside.

#4) Add a Waterproof Liner

If you really want to take your waterproofing game to the next level, consider adding a waterproof liner to your storage box.

You can purchase a pre-made liner or make one yourself using a waterproof material such as PVC or vinyl.

I found that pond liner would work pretty well here, just cut it to the size you need.

Line the inside of your storage box with the liner, making sure to cover all surfaces and seams.

Not only will this provide an extra layer of protection against water intrusion, but it will also make cleaning your storage box a breeze. 

Just be sure to measure twice and cut once, unless you want to end up with a crappy-but-somewhat-passable liner job.

#5) Elevate the Box

Finally, consider elevating your storage box off the ground

If the box is sitting directly on the ground, it may absorb moisture from the soil and become waterlogged.

Elevating the box on blocks or a platform will help keep it dry and prevent water from seeping in from the bottom (a common problem for outdoor storage boxes).

Conclusion and Final Thoughts

In conclusion, making your outdoor storage box truly waterproof requires a bit of effort, but it's worth it to protect your precious puppy-themed cushions, or other belongings, from water damage. 

cushions getting wet in rain

By sealing the seams, using weatherstripping, adding a waterproof liner, and elevating the box, you can ensure that your storage box stays bone dry and secure no matter what good ol’ Mother Nature throws your way.

However, if I could only choose one, I’d say applying sealant will solve a major part of the water intrusion problems.

Let me know your thoughts below, or any other tips you may have!


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