One of the most common problems plaguing homeowners, contractors and industry professionals alike are water and moisture issues. Basements are usually the most common application for these water problems since the basement is located in close proximity to the water table. There are thousands of products on the market that claim to waterproof and solve all of your water and moisture problems.

Although water is extremely hydrating and needed to sustain life, it can also be extremely detrimental and invasive to your home and more specifically your concrete. Concrete is a mixutre of Portland cement, aggregate and water. Once cured it is an extremely durable building material used in residential and commercial applications alike. Although concrete may seem hard and immoveable, it is actually filled with a lot of small voids, and pores. These pores and voids create passages for water to travel. Water can bring salts and chlorides creating corrosion, cracking and spalling. Water can also breed mold and mildew.

In order to prevent water from damaging concrete a waterproofing concrete sealer is extremely beneficial. There are many different types of waterproofing concrete sealers and every application may require a different solutions. We highlight the most popular choices below.

For interior applications:

Basement are well known for their water problems and a wet basement is not a homeowners friend. Luckily there are waterproofing concrete sealers that when used properly can keep a basment dry. For basement floors, especially basment floors that will be finished with carpet, hardwood or tile a moisture vapor barrier coating is the absolute best choice. Commonly used in areas with high amounts of moisture, the Vapor-Tek 440 is one of the best moisture vapor barrier coating products on the market to reduce moisture vapor transmission. The high performance and quick installation features of this system make it an ideal solution to seal concrete from all water and moisture before installing carpet and wood or vinyl flooring. The Vapor-Tek 440 will reduce moisture vapor emission rates of up to 20lb. / 24 hr / 1,000 ft. prior to the application of flooring. It will also stop moisture from coming up through the slab to stop concrete floor seepage.

In order to determine the moisture vapor emission rate of your concrete perform a calcium chloride test. To perform the test, a small amount of calcium chloride (salt) is placed under plastic on a clean piece of concrete. The calcium chloride (salt) absorbs the moisture coming from the concrete slab over a period of about 72 hours. The weight gain of the calcium chloride is then measured and the moisture vapor emission rate MVER is calculated. If a high amount of moisture is present in the concrete (over 3 lb according to a calcium chloride test) it is best to use a moisture vapor barrier coating. If the moisture content of the concrete is less than 4% you can use a penetrating concrete waterproofing sealer. A calcium chloride test can be purchased directly through Amazon for about 18 USD.

Alternatively, if your concrete has never had a moisture or dampness problem and you are looking for a preventative, cost-effective solution, use the Lithi-Tek 9500. This all-in-one product will reduce the porosity of the concrete making it less permeable to moisture. Althought it will not prevent a large amount of moisture from coming up through the concrete like the Vapor-Tek 440, it is an effective solution to reduce porosity.

For exterior applications:

Exterior applications that need a waterproofing concrete sealer include driveways, patios and pool decks. It is always a good idea to keep water out of concrete since water brings aggressive substances that can cause concrete to deteriorate over time.

Fortunately, there is an easy and cost-effective way to waterproof exterior concrete. One of the best concrete sealers is the Siloxa-Tek 8500. It is a penetrating concrete sealer designed to treat a variety of applications with an emphasis on hydrophobicity and reduction of water uptake. It dries completely clear with a natural finish that will not change the look or appearance of the susbtrate. Guaranteed to outlast and outperform all other concrete sealers on the market, the Siloxa-Tek 8500 is the most advanced concrete sealer ever formulated; designed to prevent the growth of mold and mildew. An added benefit is salt resistance. If you are sealing a concrete driveway located in an area exposed to airborne salts or deicing salts the Siloxa-Tek 8500 is able to effectively prevent chloride ion penetration, keeping the concrete free of pitting and cracking.

If you are looking to use a waterproofing concrete sealer but you are also looking for added oil resistance, the Siloxa-Tek 8510 is an excellent choice. The Siloxa-Tek 8510 will give you all the benefits of the Siloxa-Tek 8500 with added staining protection from oils and greases. Since it is a solvent carried product that is almost 100% actives, it is able to go above and beyond the protection of the Siloxa-Tek 8500.

9500 Concrete Sealer Bottle

Lithi-Tek 9500


8500 Concrete Sealer Bottle

Siloxa-Tek 8500

Water & Salt Repel

440 Concrete Sealer Bottle

Vapor-Tek 440

Moisture Vapor Barrier Coating

Published Monday 15th of July 2024 // Updated Tuesday 1st of August 2023

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