How to Seal Your Garage Walls Using Drylok?

Drylok sealer for garage walls

Sealing and waterproofing your garage is important, especially if you live in a wet or even humid area.

If you don’t waterproof the garage walls, you run the risk of water getting in and causing puddles or worse, outright flooding.

There are several different waterproofing paints that you can take advantage of, but Drylok tends to be the most popular.

What is Drylok and How Does it Work?

Drylok is a masonry waterproofer with a latex base. It applies smoothly and easily like paint.

Its texture has often been described as somewhere between maple syrup and latex paint.

This product is capable of acting both as a finishing coat and as a primer.

Because of this, you can treat this product as a simple way to both waterproof and paint a wall in the garage.

It comes available in a number of different colors, but if you aren’t satisfied with what’s available, you could instead add another finishing coat of your choice of latex paint on top of it.

For many people, the next step after applying Drylok is to add drywall, so it isn’t that big of a concern.

There are a few things to keep in mind about Drylok before you commit to using it:

  • The walls must be totally clean and completely dry to the touch before you begin to apply Drylok.
  • Drylok sticks to any oil- or latex-based paints, but it will not waterproof a concrete garage wall coated with these types of paint.
  • It has a warranty that lasts for 18 years, so you should be all set for the length of time you live in your house.
  • Two coats of Drylok will need to be applied for the product to be protected by the warranty.

You can tint Drylok to look how you like it, but this isn’t recommended, as it could interfere with the waterproofing components and ruin the seal.

Instead, it is recommended that you use Drylok as a base coat in white and then add a finishing coat of any color you like after the act.

How to Apply Drylok to Seal Your Garage Walls?

Following are the steps you should take to properly waterproof your garage walls with Drylok sealer.

Step 1. Prepare the walls

Though this part can be time-consuming, it is quite simple, and it deserves your attention to ensure the product works as intended.

If your walls are already painted with oil-based or latex paint, you will first need to remove them.

Otherwise, the product won’t stick properly. If you are covering bare walls, the first thing you need to do is thoroughly clean all of the surfaces that you intend to paint.

You may notice that you have some white streaks on your concrete blocks if the house is older.

This is called efflorescence.

This occurs when moisture has entered the concrete block and left behind minerals and salt that discolor the block.

If you see any of this, you’ll need to first clean it away. Otherwise, Drylok may have a difficult time trying to stick to such a coating.

You can use muriatic acid if you need an aggressive cleaner for the concrete, but this is only recommended as a last resort. In truth, unless your walls are quite dirty and stained, you will be just fine using a milder cleaning agent.

Step 2. Fill in the holes and cracks

If you don’t take the time to fill in any gashes in the concrete, it may cause problems for you down the line.

If you don’t, water can still get into the walls regardless of whether or not the paint has been applied.

Keep in mind that Drylok waterproofing sealant can take as long as several hours to dry completely, so if you are hoping to get the entire project done in a single day, this is possible.

You can use just about any kind of masonry crack filler, including the brand that Drylok makes.

There are plenty of options out there, but so long as they are made for use with concrete blocks, they will all get the job done just fine.

All you will have to do is squeeze some of the crack filler into the cracks and holes and then clean away any excess product.

If you notice the hole is larger than a centimeter deep, you should fill in the cracks in multiple layers, letting each application dry in between before adding another.

If you want a nice, smooth finish, you’ll need to use sandpaper to smooth it down after the act.

The main takeaway here is that you must fill in the cracks before you begin to paint, otherwise, you will come to regret it.

Step 3. Apply the Drylok to the walls

Doing this is much like painting any other kind of surface.

There are two parts to painting a wall.

The first part is painting the main area, and the second part is the edges.

For the edges, it is best to get a small roller to take care of the job.

You could also use a brush. Whatever you choose, it’s important to use the right tools. In this instance, that means masonry tools:

Masonry brush- A masonry brush has a heavy-duty feel and tends to be coarser than your average paintbrush.

They must be this way, otherwise, the concrete wall is rough enough that it will tear through a typical paintbrush.

Masonry paint roller- Choose a roller that has a minimum of a .75-inch nap.

This will allow it to soak up plenty of paint, so it can be spread more easily over the rough surface of the concrete blocks.

The kind of paint tray you choose isn’t all that important.

You can just use any spare one you have from a different paint job, and it’ll do the trick just fine.

Keep in mind that this product goes on quite thick and is applied the same way you’d paint anything else.

You can cover around 75 to 100 square feet of wall with a single gallon.

However, in order to apply the two coats of Drylok, you’ll likely need about 1.5 gallons to cover a single wall in the garage.

This could be a bit pricey by the end of things, but ultimately, you will pay less for Drylok than you would pay to fix a flooded garage.

waterproofing garage walls

Why Should You Waterproof Your Garage Walls – What Will Happen if You Don’t?

Many of the homes that were built in the last three or four decades have foundations made of concrete blocks.

This foundation is solid, and perhaps most importantly, very inexpensive both to produce and to use.

Unfortunately, this popular foundation material is also remarkably porous.

Because of this, when the weather forecast calls for stormy weather, the wind will drive the rain against the house, where it can seep in anywhere that it can manage.

If water seeps through a concrete block foundation, it can cause serious damage.

It could also serve as a breeding ground for toxic mildew and mold to form.

The less water that is allowed to enter your house, the better chance you have of not having to deal with the possible serious consequences.

The Bottom Line

All in all, Drylok is a great way to waterproof your garage walls and keep them looking new for years to come.

By following the simple steps outlined in this article, you can ensure that your garage stays dry and protected from the elements.

Have you ever used Drylok to seal and waterproof your garage walls? Let us know how it went!

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