How to Waterproof Your Basement with Concrete Sealer

How to Waterproof Your Basement with Concrete Sealer

Are you tired of dealing with a leaky basement every time it rains? Waterproofing your basement with a concrete sealer is a cost-effective and efficient solution to prevent water damage and mold growth. In this article, we will discuss the benefits of using a concrete sealer, step-by-step instructions on how to apply it, and tips for maintaining a waterproof basement. Let’s dive in and learn how to protect your home from water infiltration.

Preparing Your Basement for Waterproofing

Before applying a concrete sealer to waterproof your basement, it is important to properly prepare the area. This will ensure that the sealer adheres properly and provides maximum protection against water damage.

Clearing the Area

Start by clearing out any furniture, boxes, or other items from your basement. This will allow you to have a clear and unobstructed workspace to apply the sealer. Make sure to remove any rugs or carpets as well to expose the entire concrete surface.

Repairing Cracks and Damages

Inspect the basement walls and floor for any cracks or damages that may allow water to seep through. Use a concrete repair kit to fill in any cracks and patch up any holes. This will help create a smooth and even surface for the sealer to adhere to.

Cleaning the Surface

Before applying the concrete sealer, it is crucial to clean the surface thoroughly. Use a broom to sweep away any dust and debris, and then use a pressure washer or a scrub brush with a cleaning solution to remove any dirt or stains. Allow the surface to dry completely before moving on to the next step of waterproofing your basement.

Choosing the Right Concrete Sealer

When it comes to waterproofing your basement with a concrete sealer, it is important to choose the right product for your specific needs. There are various factors to consider, such as the type of concrete you have, the level of moisture in your basement, and the desired longevity of the sealer.

Different Types of Concrete Sealers

There are different types of concrete sealers available on the market, including penetrating sealers, topical sealers, and integral sealers. Penetrating sealers are absorbed into the concrete to create a protective barrier, while topical sealers form a protective layer on the surface of the concrete. Integral sealers are added to the concrete mix before it is poured to increase its resistance to moisture.

Considerations for Selection

When choosing a concrete sealer for your basement, you should consider the porosity of the concrete, the level of moisture in the basement, and the intended use of the space. For example, if your basement is prone to flooding, you may want to opt for a heavy-duty penetrating sealer that offers maximum protection against water intrusion.

Testing the Sealer

Before applying the concrete sealer to your basement, it is important to test it in a small, inconspicuous area to ensure compatibility with the concrete and achieve the desired results. This will help you determine the coverage rate, drying time, and overall performance of the sealer before applying it to the entire basement.

By choosing the right concrete sealer, considering different types available, and testing the product beforehand, you can effectively waterproof your basement and protect it from moisture damage.

Applying the Concrete Sealer

When waterproofing your basement with a concrete sealer, it is important to follow the proper steps to ensure a successful outcome. One of the key steps in this process is applying the concrete sealer correctly. Here is a guide on how to apply the concrete sealer effectively.

Gathering Necessary Tools

Before starting the application process, make sure you have all the necessary tools and materials. This includes the concrete sealer itself, a paint roller or brush, a paint tray, gloves, protective eyewear, and a respirator mask. It is also important to have good ventilation in the area where you will be working.

Applying the First Coat

Start by cleaning the surface of the basement walls with a mild detergent and water to remove any dirt, dust, or debris. Allow the walls to dry completely before applying the first coat of concrete sealer. Pour the sealer into the paint tray and use a paint roller or brush to apply an even coat to the walls. Make sure to work in small sections and apply the sealer in a thin, even layer. Allow the first coat to dry completely before applying subsequent coats.

Applying Subsequent Coats

Once the first coat has dried, you can apply additional coats of concrete sealer to further waterproof the basement walls. Follow the same process of cleaning the walls and applying the sealer in thin, even layers. Depending on the type of sealer you are using, you may need to apply multiple coats for optimal protection. Allow each coat to dry completely before applying the next one.

By following these steps and applying the concrete sealer correctly, you can effectively waterproof your basement and protect it from water damage. Remember to always read and follow the manufacturer’s instructions for the specific sealer you are using.

Maintaining the Waterproofing

Proper maintenance is crucial to ensure that your basement remains waterproof. By following these tips, you can extend the life of the concrete sealer and protect your basement from water damage.

Regular Inspections

It’s important to regularly inspect the basement walls and floors for any signs of water damage or sealer deterioration. Look out for cracks, peeling sealer, or water stains, as these could indicate a problem with the waterproofing. If you notice any issues, address them promptly to prevent further damage.

Reapplication of Sealer

Over time, the concrete sealer may wear off due to exposure to water, UV rays, and general wear and tear. To maintain the waterproofing, it’s recommended to reapply the sealer every few years or as needed. This will ensure that your basement remains protected from water intrusion and moisture.

Dealing with Water Intrusion

In the event of water intrusion, it’s important to address the issue immediately to prevent further damage to your basement. Identify the source of the water and take necessary steps to fix the problem, whether it’s repairing a leaky pipe, improving drainage around the foundation, or installing a sump pump. Additionally, consider consulting a professional waterproofing contractor for expert assistance in resolving water intrusion issues.


In conclusion, using a concrete sealer to waterproof your basement is a cost-effective and efficient way to protect your home from water damage. By following the steps outlined in this article, you can ensure that your basement remains dry and safe for years to come. Remember to properly prepare the surface, apply the sealer according to the manufacturer’s instructions, and regularly maintain the seal to keep your basement waterproof. Don’t wait until it’s too late – take action now to protect your basement with a quality concrete sealer.