Best Concrete Waterproofing Sealer: Top 15 for 2021 (Reviews & Guide)

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Maintaining a home you’re proud of takes a ton of work and you will often have to pay attention to everything. If you were involved in your home’s construction, the burden becomes even more greater. That’s why cracks threaten all of that because they basically throw all your hard work out the window. The solution, we’ve found, is always to buy and apply the best concrete waterproofing sealer products. But how do you know which one to purchase, and what’s the most efficient way to apply it? We answer all these questions and more in this article. As a bonus, we also share some helpful tips at the end.

Guide to choosing the Best Concrete Waterproofing Sealer Products for your Needs

When shopping for a waterproofing sealer, it helps to keep the following factors in mind.

Ease of Application

Most waterproofing sealants can be applied the same as paint. You only need a paintbrush, roller or paint sprayer to get started. But you have to consider if the product needs a primer, or if it needs to be mixed in with water. If any of these is the case, the ease of application obviously goes down a notch.

Elongation

Elongation refers to the expansion ability of a waterproofing membrane. The higher the elongation. Look out for products of between 900% and 1000% elongation .These tend to deliver the most value.

Top 15 Best Concrete Waterproofing Sealer on the Market

Now that you know exactly what to look for, here are the best concrete waterproofing sealer we found during our search.

DRY-TREAT Stain-Proof Premium Impregnating Sealer for Stone

What do you get when you combine advanced permanent bonding technology with a breathable formula? The DRY-TREAT Stain-Proof sealer, of course. And we love the fact that a gallon actually costs less than $100. That means it’s more affordable than most “premium” concrete waterproofing sealer but still delivers a ton of value.

The formula is super-penetrating, but with long-lasting protection. That means you can seal the deepest of cracks and not worry about the strength. We also love that it works on multiple surfaces including natural stone, tiles, pavers, concrete, and even brick.

Stain-Proof Plus Premium Impregnating Sealer

The Stain-Proof impregnating sealer boasts of reinforced protection. In this way, it protects your surfaces from more than just dirt. There’s also stains, water damage, salt, and even oil. As you can expect from all great formulas, it is also breathable. By allowing water vapor to escape, the sealant lasts longer.

We also love that it has a stain-repellent property. That makes your job a little easier when maintaining. The sealer has 3 custom sealing molecules for 3 levels of penetration. It is also one of the most versatile products on this list because it works on unique surfaces like basalt, bluestone and quartzite.

Rain Guard-CR-0356 Micro-Seal 1 Gal

We love that this Rain Guard sealant makes one promise because not many products do that; they overpromise and underdeliver. While the Rain Guard certainly delivers on a number of fronts, it also does one thing really well – protect and extend the life of any masonry horizontal or vertical surface. It does this by providing a hydrophobic coating.

But that’s not all. The guard can also be used as a primer before painting because that prevents moisture transfer in the substrate. It has a 10-year satisfaction guarantee, and will work just as well in cold weather or hot.

Liquid Rubber NeoPond Waterproof Pond Sealant

From the title, you can tell that this product is adept at sealing ponds. If you’ve ever had a pond, you’ll realize that they spring a leak sooner or later, whether they are made from concrete, EPDM or Wood. The Liquid Rubber NeoPond forms into a membrane that cures seamlessly into a waterproof membrane. It is just as effective on regular surfaces that see a lot more moisture over time.

The product is environmentally friendly, quite flexible, and easy to apply. With a paint brush or roller, you can get to work and create a heavy duty waterproof membrane. It works for surfaces including bridge joints, seams, vents, gaps, and even protrusions.

Siloxa-Tek 8500 Ready to Use – 1 Gallon Penetrating Concrete Sealer

We love two things about this product. It is industrial-grade, which means you’ll get a ton of value from it. But it is also quite affordable – a gallon costs less than $100 – which is great. The concrete sealer is water-based, and silane engineered to reduce water and moisture intrusion.

The Siloxa-Tek concrete sealer also reduces water ingress, moisture intrusion, and ASR. But that’s not all. It has an excellent water beading effect, excellent penetration, and can be used on several surfaces including driveways, garages, and pool decks. The application is as easy as using a sprayer, roller, or brush.

Liquid Rubber Waterproof Sealant – Multi-Surface Leak Repair

The Liquid Rubber Waterproof Sealant basically tells you everything you need to know in the name. It is excellent and offers a protective finish for flat and metal roofs, basements, wood, and even concrete. And because it’s flexible with high elongation, you can apply it in cracks without adhesion failure.

Now let’s tell you a little about the coverage. With vertical surfaces, you can cover as much as 30 square feet with 1 gallon. We also love the fact that it’s environmentally friendly. You’ll be glad to know that it’s incredibly easy to apply; if you’ve ever painted your apartment, you’ll have no trouble whatsoever.

Stain-Proof Plus Premium Impregnating Sealer

One of the concerns you might have when waterproofing your surfaces is penetrating power. You don’t want a superficial coating that wears off in no time. The good news is that this Stain-Proof Plus Premium Impregnating Sealer is perfect for you. It contains a super penetrator that lets you access dense surfaces including granite and marble.

The product also has reinforced protection that guards against stains and water damage. Even though you hardly notice it, this membrane is breathable which is excellent because trapped water can be just as dangerous as the external drops. The sealer also works on many countertops, including basalt, bluestone, concrete, and quartzite.

1 Gallon AQUA-X 11 Clear, Penetrating Stone and Concrete Sealer

Here we have a professional grade water-based indoor/outdoor concrete, stone, and brick sealer. The best thing about this product is its versatility. The second great thing about it is the price. For such a premium product, it is more affordable than many others in its category.

We love that it’s water-based and environmentally friendly. You can apply it indoors without worrying about masks or extra ventilation. Not only that but because it’s stain-resistant, whatever surface you coat will become very easy to clean up and maintain. One thing we love to add is how much value you get from it. A gallon can cover up to 800 square feet.

MasonryDefender 1 Gallon Penetrating Concrete Sealer for Driveways

This product provides a long-lasting, non-glossy invisible coat to your concrete surfaces. But it will work just as well on wood and marble. We love that it can last up to 5 years meaning you won’t have to worry about your waterproofing for a long time once you apply a coat.

You’ll be glad to know that this powerful concrete sealer is easy to apply. But first, it’s important to clean the surface as much as possible. Debris, oil, grease, and dirt can affect the sealant’s efficacy. Then, all you need is a low-pressure garden sprayer or a paint roller and you’re good to go.

SEAL-ONCE SO7910 Nano+Poly Concrete & Masonry Penetrating Sealer

This product is aptly named because after you seal-once, you can forget all about it. The solution creates a UV-stable non-yellowing coating that will preserve the natural color of your concrete floor while still resisting water damage. We also love that the product prevents water deposits, cracking, spalling, and even mold growth.

The SEAL-ONCE penetrating sealer is perfectly safe. It is environmentally friendly and safe around pets, plants, and even people. Once dried, the final product is also quite breathable and so it prevents water from going in, but also allows moisture to escape.

Liquid Rubber Repair and Restore Concrete Kit

This product stands above the competition by giving you a little extra value with your purchase. The bundle comes with a gallon of foundation sealant and geotextile, one of the strongest materials in the roofing industry. The foundation sealant is highly versatile and useful for everything from ICFs and basements to shower liners, deck and fence posts, and even wood.

Because of its liquid rubber composition, it is also highly flexible. By this, we mean that it has over 900% elongation. You can also get up to 50 square feet per gallon of coat. When applying, you won’t need to mix the solution or prime the surface. Simply use a brush, roller, or paint sprayer.

INSL-X AMW100009A-01 WaterBlock Acrylic Masonry Waterproofer Paint

The INSL-X has a water-based mold and mildew-resistant coating that’s perfect for both interior exterior concrete walls. This means you can use it on everything from basement walls to foundations and even retaining walls. The product is fast drying with up to pH 13 alkaline resistance.

The manufacturer recommends that you only paint when the surface and air temperatures are between 50 and 90 degrees Celsius. You’ll be glad to know that the INSL-X paint can withstand up to 12 psi hydrostatic pressure.

KILZ Interior/Exterior Basement and Masonry Waterproofing Paint

KILZ has a wealth of experience in the field of waterproofing and they use all of that experience to deliver one of the best possible waterproofing paints available on the market. The product is specially formulated to waterproof and seal porous concrete surfaces both indoors and outdoors.

It can do this thanks to its unique composition and nanotechnology. The paint forms a barrier that stops water from penetrating. Because it has an impressive elongation, the paint can also find its way into small spaces to seal up cracks in your masonry. A single gallon can cover up to 125 square feet of space.

Lithi-Tek 9500 Ultra Concentrate – 1 Gallon

Our favorite thing about this product isn’t even the solution itself; it’s all the promises that the manufacturer makes with the product. We love it because they deliver on all the points and more. The Lithi-Tek concrete concealer is an industrial-grade water-based sealer that was designed to densify, strengthen, and waterproof concrete. The solution can also increase abrasion resistance and reduce staining.

You can mix the sealer to become as thick or as light as you want. The manufacturer recommends diluting it with 4 gallons of water for every gallon of LIthi-Tek for a solution that can treat up to 1000 square feet of concrete.

ToughCrete Concrete Sealer

The ToughCrete concrete sealer is one of the toughest solutions on the market. It is perfect for driveways, garage floors, sidewalks, patios, and other concrete surfaces. Many industry experts believe that it is the number-one siloxane sealer for protecting your favorite surfaces, and the manufacturer is offering a 10-year satisfaction guarantee to prove it.

It is easy to apply, has remarkable elongation, and is very environmentally friendly. As expected, it is also very breathable which means it won’t trap moisture and promote the growth of mildew and mold.

Conclusion

After you pick the best concrete waterproofing sealer, it’s important to follow certain guidelines to get the best possible results. We always recommend that you begin by cleaning the application surface. No matter the strength or efficacy of your solution, a dusty or dirty concrete floor can make the waterproofing paint less effective. Next, it’s also a good idea to stick with the manufacturer’s recommendations. If the guideline states that you cover 50 square feet with 1 gallon, mixing it with water is a bad idea. That’s because diluting the solution will give you a less potent waterproof layer, which can become quite counterproductive.