How to Waterproof Outdoor Cabinets

Are you thinking of incorporating some cabinets into your outdoor space? If so, you need to make sure that they are properly waterproofed and sealed. This will help protect the cabinets and the contents within them from rain, snow, and other elements. Here are some tips on how to waterproof outdoor cabinets.

How to Waterproof Outdoor Cabinets

Outdoor cabinets are an essential addition to any outdoor space. They provide extra storage for items like tools, pool toys, or even garden accessories you don’t want to leave out in the sun and wind, and they can also be used as a creative element in your landscaping plans. Additionally, waterproofing your outdoor cabinets is an important step in keeping them looking great.

In this blog post, we’ll explore how to protect your outdoor cabinets from moisture damage by covering the basics of waterproofing techniques and materials so you can make sure yours will look beautiful!

What are the Benefits of Waterproofing Outdoor Cabinets?

Waterproofing your outdoor cabinets helps them to last longer and look better. This extra layer of protection is especially important if the cabinets are being used in an area that receives a lot of rain, snow, or other forms of moisture. It will also help keep the contents dry and prevent any potential damage from the elements.

Waterproofing also makes it easier to clean your outdoor cabinets and helps prevent discoloration due to extended exposure to the sun. Plus, it can help protect against rust and other forms of corrosion that could otherwise damage the cabinet’s structure over time.

What Will You Need?

Before you start waterproofing your outdoor cabinets, you will need the following materials:

  • Waterproof sealant or paint
  • Caulk gun
  • Putty knife
  • Sandpaper
  • Painter’s tape
  • Drop cloth

Once you have gathered all these items, it’s time to start.

10 Easy Steps on How To Waterproof Outdoor Cabinets

Step 1. Prepare the Cabinets

The first step in outdoor waterproofing cabinets is preparing them for the process. Start by removing any hardware, such as hinges, handles, or locks. Then, use a damp cloth to wipe down the cabinets to remove any dirt and debris that could interfere with the waterproofing process.

Using a Damp Cloth

Step 2. Sand the Cabinets

Once you’ve wiped them down, use sandpaper to sand the surfaces of the cabinets. This will help create a smoother surface, allowing for better adherence to the waterproof sealant. If necessary, you can also use a putty knife to scrape off any rust or flaking paint.

Step 3. Apply Painter’s Tape

Next, apply some painter’s tape around any areas you don’t want to be covered by sealant or paint (such as windowpanes). This will ensure that only your desired parts are coated in waterproofing material. Additionally, be sure to lay down a drop cloth or tarp before starting the process to protect any nearby surfaces from overspray.

Step 4. Apply the Waterproof Sealant

Now it’s time to apply the sealant or paint. Depending on how much coverage you need, you may want to use a paintbrush or roller for larger surfaces or a caulk gun for smaller areas or tight corners. Make sure to apply the waterproofing material in thin layers so that it can dry quickly and adhere properly.

Step 5. Let It Dry

Once you’ve applied the sealant, let it dry completely before moving on to the next step. This could take anywhere from several hours to overnight, depending on how thick of a layer you applied and how humid your environment is. You can use a fan to speed up the drying process.

Step 6. Sand Again (If Necessary)

Once the sealant has fully dried, inspect your work to see if any imperfections or rough edges need to be sanded down. If so, use very fine grit sandpaper and lightly go over the surface until it’s smooth. It will take a little bit of elbow grease to get it right, but the result will be worth it!

Step 7. Apply Putty Knife

Use a Putty Knife

Now it’s time for the putty knife. Run it along all of the sealed areas to ensure no air bubbles or gaps in the waterproofing material. This will help provide an extra layer of protection against moisture and dirt getting into cracks or crevices in your cabinets.

Step 8. Remove Painter’s Tape

Once you’ve completed all the steps above, you can remove the painter’s tape. This will help ensure that no sealant or paint was accidentally applied to any areas that weren’t intended to be sealed. Don’t forget to clean up any excess sealant or paint on the surrounding surfaces.

Step 9. Let It Cure

Once you’ve finished applying the waterproofing material and removing the painter’s tape, let it cure for 24-48 hours before using your outdoor cabinets. This will allow the sealant or paint to be fully set so it can provide maximum protection against moisture and dirt. Moreover, it will also give time for any lingering fumes to dissipate.

Step 10. Enjoy Your Waterproof Cabinets!

Now that your cabinets are properly sealed enjoy how beautiful they look! The extra effort of waterproofing them will pay off in terms of how much longer they’ll stay looking great. Remember to check them periodically and re-apply sealant or paint as needed. With proper care, your outdoor cabinets should last for many years!

We hope this blog post has been helpful in teaching you waterproof outdoor cabinets! By following these steps, you can ensure that your cabinets will remain beautiful for many years to come.

5 Additional Tips and Tricks

Using a Sealant
  1. Always use a high-quality sealant or coating that is specifically designed for outdoor cabinets. This will help ensure your cabinets are waterproofed properly and provide lasting protection.
  2. For extra protection, consider applying a coat of water-resistant paint to the outside of your cabinets. This will ensure that no moisture can enter the cabinet and ruin its contents.
  3. If you want to make sure your cabinets are extremely waterproof, consider using a sealant with an epoxy-based compound such as polyurethane or silicone coating. These compounds can provide superior protection against water damage for years to come.
  4. Make sure that all joints and edges are tightly sealed. Using caulk around seams can help prevent any moisture from getting underneath and damaging the wood or other materials used in the cabinet construction.
  5. Finally, always remember to check for signs of water damage periodically, such as discoloration or warping. If any signs of water damage are present, take the necessary steps to repair them right away. This will ensure that your cabinets stay waterproofed and look great for years to come.

By following these simple tips and tricks on waterproof outdoor cabinets, you’ll be able to protect all your belongings from the elements and keep them in excellent condition. With proper care and maintenance, your outdoor cabinets can last a lifetime! So make sure you follow these tips whenever you’re dealing with waterproof outdoor cabinets.

5 Things You Should Avoid

  1. Don’t use paint as a waterproof coating. Paint won’t do anything to keep water out of your outdoor cabinets and can actually trap moisture inside, which will cause damage over time.
  2. Don’t rely on sealants alone. Sealants are a great option for keeping water out, but you’ll want to combine them with other waterproofing methods in order to create an effective barrier against the elements.
  3. Avoid cheap products that claim to waterproof your cabinets. Many of these coatings are not suited for outdoor applications and won’t stand up to the elements over time, so it’s best to stick with well-known brands with proven quality and performance track records.
  4. Don’t overlook ventilation. While you want to make sure your outdoor cabinets are waterproof, it’s important that they also have adequate ventilation to prevent moisture and mildew from building up inside.
  5. Don’t forget about maintenance. Even the best waterproofing job won’t last forever, so plan to check your outdoor cabinets periodically for any signs of deterioration or damage caused by water seepage. Doing regular maintenance will help extend the life of your investment and keep it looking great year after year.

By following these simple steps and avoiding common mistakes, you can easily waterproof your outdoor cabinets and ensure they stand the test of time against all kinds of weather conditions. With a good sealant in place, you’ll be able to enjoy their beauty and functionality for years to come.

What is the Best Waterproofing for Wood?

High-quality Water-resistant Paint

The best waterproofing material for wood is a combination of epoxy-based sealants, such as polyurethane or silicone, and high-quality water-resistant paint. This will provide superior protection against the elements while still allowing the wood to breathe.

Additionally, it’s important to ensure all joints and edges are sealed tightly with caulk to prevent moisture from getting underneath and causing damage over time. Finally, don’t forget to check your outdoor cabinets regularly for signs of wear or water damage and repair them immediately if necessary.

With regular maintenance and proper waterproofing materials in place, you can be sure that your outdoor cabinets will remain beautiful for many years to come.

What Material is Water Resistant for Cabinets?

When it comes to waterproofing outdoor cabinets, the most water resistant material is stainless steel. This metal is highly durable and resistant to rust and corrosion when exposed to moisture. It also provides an aesthetically pleasing finish that weather or UV rays, like other materials, might damage.

However, if you prefer a different look for your outdoor cabinetry, there are other materials available such as aluminum, vinyl, and plastic, that can provide good protection against the elements while still maintaining a stylish appearance. Just make sure they are properly sealed with caulk or another sealant to ensure no water seeps in over time.

No matter what material you choose for your outdoor cabinets, remember that proper waterproofing is essential for keeping them looking great and resisting the elements. With the right materials, techniques, and maintenance in place, you can be sure that your cabinets will last for many years to come.

Properly Sealed With Caulk


Waterproofing outdoor cabinets is an affordable and practical way of protecting your possessions from the elements. By taking these easy steps and following our advice, you can keep your cabinets in top condition for years to come. Don’t forget that sealing the exterior of your cabinet can help increase its overall durability and prevent any problems caused by water infiltration or seepage. Of course, it’s also important to keep an eye on any potential maintenance problems throughout the year, such as loose pieces of hardware or small cracks that might be forming.

Finally, if you find yourself overwhelmed with the process, don’t hesitate to reach out to a professional – they can ensure that you get the best possible results out of waterproofing your outdoor cabinets. After all, taking care of your most valuable possessions is always worth it!

Hopefully, the article on how to waterproof outdoor cabinets has been informative and helpful to you. With the right materials and techniques, you’ll be able to keep your outdoor cabinets in top condition for years to come! Good luck!

Photo of author

Adrian Green

Adrian is a woodworking hobbyist and has loved Woodworking since he was 10 years old. Back then in childhood, his father used to have a furniture shop. He used to help his dad and learned a lot from him about how to fix woodworking furniture, basic carpentry knowledge and also about how to work hard and take care of business. He enjoys woodworking as a hobby. He loves the feeling of creating something with his own hands, and the satisfaction that comes from seeing his finished products used by others.

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