How to Make Wall Paint Waterproof: 7 Important Tips & Advice

Making your wall paint waterproof is helpful. It helps protect the walls from water, dirt, and mold. Waterproofing makes it easier to clean, and the paint will last longer. 

How to Make Wall Paint Waterproof

It also helps ensure that the paint won’t peel or crack because of rain or humidity.

Waterproofing is especially useful in bathrooms or other areas that often get wet. It can prevent stains and discoloration too.

This blog post will help you to learn how to make wall paint waterproof. It will explain the process in detail.

Materials You Will Need

  • A paint roller and tray
  • Exterior paint in your desired color
  • Paint thinner
  • Waterproofing agent
  • Paintbrush
  • Drop cloths or tarps
  • Painter’s tape
  • Masking tape

6 Step Process for How to Make Wall Paint Waterproof

Step 1: Inspect Before You Start Waterproofing

Before you waterproof your walls, check them for any damage. Look for cracks, chips, and paint that are coming off. If you find any of these things, fix them before waterproofing the walls.

Step 2: Clean and Prime the Wall 

Once you are done fixing everything, wash the walls with mild soap and warm water. This will remove anything that might stop the waterproof paint from working well. 

Prime the Wall

After that, use a good primer to ensure the surface is even before using the waterproof paint.

Step 3: Select the Right Paint 

Choosing the right type of paint for waterproofing your walls is essential. Look for a paint that says it is “waterproof” on the label. 

You can also choose to use a sealer or an exterior latex-based paint. Once you have chosen the right paint, it’s time to begin painting. 

Start at the top of the wall and apply the waterproof paint in an even layer with a brush or roller. Work your way down from top to bottom and ensure that each stroke covers all previous layers of paint.

Step 4: Allow Time to Dry 

Allow 24 to 48 hours for the paint to dry properly. Ensure you don’t touch the walls during this time, as it could cause damage to the newly-painted surface. 

Adding a sealer over the waterproof paint is recommended. This will add an extra layer of protection, helping to ensure that your walls remain waterproof for a longer period.

Step 5: Apply Multiple Coats 

You can apply multiple coats of waterproof paint to your walls for added protection. This will help keep the walls safe from water damage in the long run. 

Allow time between each coat for the paint to dry properly. This could take up to 24 hours, depending on the temperature and humidity of your area.

Step 6: Sand Between Coats 

You can sand between coats for a smoother finish if you choose. Use fine-grit sandpaper and gently rub it over the painted surface before applying each new coat. 

Sand Between Coats

Once you have applied the desired number of coats, finish with a clear finishing coat. This will provide an extra layer of protection and give your walls a nice sheen and glossy look.

To keep your wall paint looking good, you need to take care of it. Clean it with a damp cloth or sponge to remove dust and dirt. 

Check the wall every few months for water damage. If you see any problems, fix them immediately so they do not worsen.

7 Safety Tips for Making Wall Paint Waterproof

  1. Before waterproofing, wear the appropriate safety gear, such as goggles and gloves.
  2. When mixing waterproof chemicals, always do so in a well-ventilated area or outside, away from people and pets.
  3. Choose a paint specifically designed for walls, such as an acrylic-based product.
  4. Prepare the wall by removing dirt or debris using a vacuum cleaner or damp cloth beforehand.
  5. If you’re waterproofing an interior wall, open all windows and doors for proper ventilation while you work.
  6. Apply multiple coats of waterproof product onto the walls, allowing each coat to dry completely before adding the next.
  7. After you’re finished waterproofing, please test a small part of the wall with water to ensure it has been done properly.

If you follow these safety tips for waterproofing your walls, they will stay strong and look nice for a long time.

Maintenance Tips After Waterproofing 

Remember to take care of it once you use a sealant to waterproof your wall paint. 

Follow some tips for keeping it working well.

signs of water damage on the wall-painted surface
  • Regularly check if the sealant has worn off or needs reapplication in certain areas.
  • Make sure to clean any dirt and debris on the surface of the wall-painted area.
  • If you notice any cracks in the wall paint, fill them with a waterproofing compound or paint.
  • Look for any signs of water damage on the wall-painted surface and address them immediately.

These tips can increase the longevity of your wall paint and keep it looking new for longer. With regular maintenance, you can save yourself from costly repairs in the future.

Are There Any Environmental Considerations When Using Waterproofing Paint?

When you pick paint for your walls, it is important to consider the environment. Some paints can have bad chemicals that hurt the environment. 

Look for paints that an independent organization says are safe and not poisonous. Some paints also have things called VOCs which pollute the air

Choose paints with low or no VOCs to help reduce your environmental impact. Finally, consider using natural and eco-friendly paints whenever possible. 

These products are not only better for the environment, but they can also be safer for you and your family. 

With a little research and care, you can select a waterproofing paint that is both effective and environmentally friendly.

Importance of Making Wall Paint Waterproof

dampen sound
  • Making your wall paint waterproof can help protect it from damage. This will keep your walls looking nice for a longer time. It can even make your walls last longer.
  • Waterproofing wall paint helps keep showers and bathtubs safe. It stops water from getting through the walls and ruining them.
  • It can also help to reduce energy costs as waterproof wall paint helps to retain heat, preventing it from escaping through the walls. This is especially important during winter months in colder climates.
  • Waterproof wall paint also helps to dampen sound, reducing noise pollution throughout your home or office.
  • You can make your home healthier by waterproofing the walls. Waterproofing will stop bacteria and mold from growing. Bacteria and mold can harm your health.
  • Waterproof wall paint can help protect wallpaper or decorations from getting ruined by water. This will keep them looking nice for a longer time.

FAQs for Making Wall Paint Waterproof:

What Type of Paint Should You Use for Waterproofing?

The best type of paint for waterproofing walls is high-quality acrylic latex paint. Acrylic latex paint sticks better to the wall and stretches more than others. 

It also dries fast and lets moisture out, so it won’t cause damage to your walls in the future.

How Do You Prepare the Wall Before Applying the Paint?

Before applying the waterproof paint, it’s important to ensure the wall is clean and free of dust, dirt, grease, and other debris. 

You can use mild detergent and water to clean the wall before painting. 

When you paint, it is important to use a special kind of paint called primer. 

Primer helps the paint stick to the wall better and ensures that the paint layers look even and last longer.

How Thick Should Each Coat of Paint Be Applied?

When applying waterproof paint, it’s important to pay attention to the thickness of each coat. Generally speaking, two thin coats are better than one thick coat. 

When painting, use thin coats of paint. This helps the paint look even and makes it less likely to crack or bubble in hot or cold weather. When rolling the paint, keep a steady pressure to look smooth.

Do You Need to Use a Primer Before Painting?

When waterproofing walls, using a quality primer designed for the job is important. Primers are designed to provide a strong base and ensure that your paint will adhere properly to the wall surface. 

Primers also help seal off any gaps in the wall that may cause moisture or mildew buildup over time. 

Primers can also help hide imperfections and provide a better canvas for your finished look.

Do You Need to Apply a Sealer After Painting?

Once you are done painting, it is important to put on a sealer. This will protect the paint from the sun, water, and dirt. It also makes the paint stronger so it does not crack or peel. 

This will help ensure that your waterproof paint job is protected for years to come.

What Should You Do If There Are Cracks in the Wall?

It’s important to repair any cracks in the wall before applying waterproof paint. 

This will help ensure that water won’t be able to seep through the cracks and cause damage down the road. 

Small cracks can usually be filled with spackling paste or caulk, while larger ones may need professional repair. 

You can paint your wall as normal once the repair is complete and dry.

Can You Apply the Waterproofing Paint Yourself?

If you have a big project, getting help from a professional to apply waterproof paint is best. 

If you are sure you can do it yourself, then read the instructions carefully and be careful when doing it.

How Long Should You Wait Before Putting Any Decor Items Back on the Wall?

After you use the waterproof sealer, wait at least 24 hours before putting anything back on the wall. This gives the sealer time to dry and stick to the paint. 

If you don’t wait long enough, it could cause discoloration or damage to your walls. Also, when putting any items back up on the wall, make sure to place them in a different spot than before. 

This is because there could be a difference in texture between the sealed and unsealed areas that could cause scratches to form over time.

What Type of Finish Should You Use to Protect the Wall From Damage Over Time?

When making wall paint waterproof, the type of finish you use is extremely important. 

Using paint with a glossy finish is the best way to protect your walls from water damage. 

For more protection, get paint with an acrylic or polyurethane topcoat. These coatings will help keep water out and also make the paint last longer in sunlight.


Making walls waterproof is easy. You need a sealer that works for your wall, and you have to prep the wall and put on thin, even coats of sealer. 

Let it dry, and then you are done! 

Your walls will look good and stay strong for a long time. I hope reading this post has helped you learn how to make wall paint waterproof. 

Make sure the safety precautions are carried out in the order listed.

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