How to Seal Concrete Floor from Moisture

How to Seal Concrete Floor from Moisture?

Concrete floors are popular but also the most prone to moisture damage. Moisture can cause damage to the surface of your concrete by cracking and eroding it.

If left unchecked, moisture may lead to serious structural problems like splitting, bulging, and spalling that will ruin the appearance of your flooring.

So, how to prevent moisture problems on concrete floor? In order to prevent moisture problems on your concrete floor, you should use sealant.

But you need to know how to seal concrete floor from moisture. To make it a bit easier for you, let us discuss this topic in more detail now.

Choosing a Concrete Sealer

In order to seal concrete flooring, you should select the appropriate sealant. There are many different kinds of sealants that can be used to seal concrete floors.

Choosing a Concrete Sealer

It is important to understand the differences between the types and what each one does before selecting one to meet your requirements. Here are some of the most common concrete sealers:

1. Solvent Based Acrylic Lacquer for Wet Look

You can use a solvent-based acrylic lacquer as it gives a wet look to your concrete floor. It is the most popular type of sealant used for concrete floors.

Solvent Based Acrylic Lacquer for Wet Look

Additionally, it is the fastest and easiest to apply. You can apply this coating on bare, unsealed concrete floors. To find out the best wet look concrete sealer reviews, you should visit this blog.

2. Polyurethanes Sealers

Another type of sealant that is commonly used for concrete floors is polyurethane sealers.

This type of sealer sets into the surface to form a durable, chemical-resistant coating.

It's a single-component elastomeric sealant that dries at room temperature and humidity.

Polyurethanes Sealers

3. Penetrating Sealers

Penetrating sealers are also referred to as water-based sealers. These types of sealers penetrate deep into the surface of your concrete floor to form a protective barrier against moisture, oil, and other chemicals. Penetrating sealers are typically used to treat unsealed concrete floors.

Penetrating Sealers

How to Seal Concrete Floor from Moisture

Knowing a few of the most common types of sealers, it is now time to learn how to seal concrete garage floor or any concrete floors against moisture.

How to Seal Concrete Floor from Moisture

There are many techniques that can help with this task. Here is how you can proceed:

1. Prepare the Floor for Sealing

Before you start sealing your concrete floor, it is important to prepare the surface for sealing.

You should remove any debris and dust from the floor and clean it thoroughly so that no dirt or oil particles remain on the surface.

2. Fill in Any Holes/Cracks on the Floor

Next, fill in any holes or cracks on the floor with concrete repair filler. Using a putty knife, smooth out the excess filler and make it leveled to your satisfaction. Wait for the repair filler to dry completely before proceeding further.

Prepare the Floor for Sealing

3. Apply the Sealer

Now that your concrete floor is ready, you can start applying the sealer. Using a clean paint roller, spread the sealer evenly over the entire surface of your floor.

If you're using a solvent-based sealant, make sure the area is well ventilated also wear gloves and goggles to protect your hands and eyes.

Apply the Sealer

Once the first coat has been applied, allow it to completely dry before applying the second. After drying, you can apply a second coat using the same technique you used with the first.

Benefits of Sealing Concrete Floor

Sealing your concrete floor offers a number of benefits. Here are some of the most important benefits you can enjoy after sealing your concrete floor:

Benefits of Sealing Concrete Floor

1. Extending the Floor’s Durability

Concrete flooring will last longer when it is properly sealed. When sealers are applied to your concrete floor, the surface becomes more resistant to stains and chemicals.

This helps ensure that your concrete flooring will not wear out as quickly or easily because it can endure heavy traffic and harsh conditions.

2. Protecting the Floor

Applying a sealer to your concrete floor helps protect it from water and other liquids, as well as chemicals.

Protecting the Floor

This also means that you will not have to spend as much money on repairs or replacement because the sealer will help keep your concrete floor in excellent condition.

3. Inhibiting Mold and Mildew Growth

When you seal your concrete floor, you're not only protecting it from water damage but also from mold and mildew growth.

Applying a sealer to your floor helps prevent moisture and humidity from seeping into the surface and causing these common problems.

4. Maintaining the Floor Color

Sealing your concrete floor can help you maintain the original color of the floor. When sealers are applied to the surface, they help prevent discoloration on your floor.

Maintaining the Floor Color


Now that you have learned how to seal concrete floors from moisture, you can begin the project whenever it is needed. Like anything else, there is a right and a wrong way to go about doing this task.

By following the tips mentioned in this article, you can enjoy all the benefits that come from sealing your concrete floor including preventing damage from moisture and stains as well as protecting it from mold and mildew growth.

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