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Your Source for the Care & Repair

of Basements, Concrete, and Brick.

Talk to Experts • Find a Solution • Fix it Yourself

Your Source for the Care & Repair

of Basements, Concrete, and Brick.

Get Free Advice. Obtain Solutions. Use Industrial-Grade Products.

 Same Day Shipping.

All orders ship factory direct to your door, via UPS® and FEDEX® Ground Delivery.

Review Same Day Terms & Delivery Time

Same Day Shipping.

All orders ship factory direct to your door, via UPS and FEDEX Ground Delivery.

Same Day Terms & Delivery Time

Basement Waterproofing & Radon Mitigation Products

Did you know the average basement lets in 15-gallons of water per day?

Porous concrete and cracks in a basement’s foundation provide a pathway for groundwater and moisture-laden soil gas to invade your home. Rising basement air then spreads mold spores and radon gas throughout the house. Before you spend big money on waterproofing professionals, learn how RadonSeal products can help you make repairs yourself.

Waterproofing Concrete Sealer for Basement Walls & Floors

Use RadonSeal Deep-Penetrating Concrete Sealer against the infiltration of capillary water seepage and water vapor transmission.

Basement Foundation Wall Cracks

Use injectable polyurethane or epoxy to properly seal and waterproof water leaks through cracks and seams in poured concrete foundation walls.

Basement Floor Crack Repair Kit

Use CrackWeld Concrete Floor Crack Repair Kit for quick and permanent repair against water leaks through basement floor cracks.

Waterproof Cinder Block Foundation Walls

Cinder blocks are water-permeable building materials, meaning water can penetrate easily through them. Learn how to properly seal cinder block walls using RadonSeal and Ion-Bond Armor.

Seal Water Between Floor-To-Wall Joints

Learn how to repair water leaks between the floor and wall using ElastiPoxy Joint & Crack Filler Kit.

Seal Water Leaks Around Pipes & Form Ties

PipeTite Gap Filler Kit plugs water leaks around pipes and conduits, form-ties, holes, gaps in window wells, and cracks. 

Need advice? Ask an expert.

800.472.0603

sales@radonseal.com

Our team has been providing architects, building contractors, waterproofing professionals, crack repair specialists, and DIY homeowners with knowledgeable “how to” advice, with safe, eco-friendly waterproofing products for concrete, brick, pavers, and masonry. 

Get answers, advice, and tips from our team of professional experts. Ask a question online or give us a call to discuss.

Need advice? Ask an expert.

1-800.472.0603

sales@radonseal.com

Our team has been providing architects, building contractors, waterproofing professionals, crack repair specialists, and DIY homeowners with knowledgeable “how to” advice, and safe, eco-friendly waterproofing products for concrete, brick, pavers, and masonry. 

Get answers, advice, and tips from our team of professional experts. Ask a question online 24 hours a day, 7 days a week.

Chemically Advanced Penetrating Sealers

Foundation Walls and Basement Slabs. Brick. Subterranean structures. CMUs. Pavers. Brick. Mortar. Eco-friendly, water-based, user and pet-friendly penetrating sealer formulas. Industrial-grade waterproofing products for basements, garage floors, slab-on-grade, chimneys, garage slabs, driveways, pool decks, patios, retaining walls, and much more.

LastiSeal Penetrating Brick & Concrete Sealer

Concrete Waterproofing & Radon Mitigation in One Concrete Sealer

Seal those pesky pores inside concrete with RadonSeal Penetrating Concrete Sealer. RadonSeal works by restricting capillary water seepage, water vapor, and soil gases directly through the porous concrete. 

Concrete Waterproofing & Radon Mitigation in One Sealer

Concrete waterproofing and radon mitigation in one sealer.

Seal those pesky pores inside concrete with RadonSeal Penetrating Concrete Sealer. RadonSeal works by restricting capillary water seepage, water vapor, and soil gases directly through the porous concrete. 

Choose the Best Sealer for Your Surface.

Need help finding a sealer that suits your surface? Review our sealer guide for choosing the appropriate sealer for your surface.

RadonSeal Company Reviews.

With decades of experience, our expertise in the building industry allows us to provide architects, general contractors, and DIY homeowners with unique, commercial-grade products and hassle-free advice. Read our reviews to see what real people like you are saying about us. 

Trustpilot Reviews BBB Reviews

DIY & PRO Concrete Crack Repair Kits

Hiring a mason or a basement waterproofing specialist to make repairs to concrete cracks can be costly for homeowners. Since 1997, RadonSeal has been making it easy for Professionals and the average DIYer to make repairs to concrete, brick, and masonry themselves. Check out our line of crack repair kits for indoor and outdoor foundation walls, concrete floors, control joints, stress cracks, and pipe protrusions.

RadonSeal Crack Repair Kits

Concrete Stain & Penetrating Sealer in One!

LastiSeal Concrete Stain & Sealer both waterproofs and color stains concrete in one step. Preserve and beautify your outdoor or indoor concrete, pavers, brick, and concrete blocks! Use on driveways, walkways, patios, pool decks, basement floors, and garage slabs. Creates an attractive variegated look similar to an acid stain. 

Concrete stain and penetrating sealer.

Earth-Friendly Concrete & Masonry Cleaning Products

Avoid the use of hazardous acids and harsh chemicals when cleaning indoor, outdoor, and basement concrete, brick, and pavers. 

Concrete & Masonry Cleaners

Industrial-strength cleaning products for the removal of efflorescence, hard-water stains, oil, grease, mold, mildew, and organic growth. Use in basements, garage floors, driveways, patios, pool decks, and more.

Concrete Etchers

Industrial-strength concrete etchers and cleaners used to open the pores in hard-troweled concrete floors, to reduce pH, and clean concrete before applying penetrating sealers, water-based stains, paints, overlays, and coatings.

Mold & Mildew Cleaner

Avoid unhealthy chlorine or harsh chemicals. BioZap Mold & Mildew Cleaner cleans mildew and organic stains from surfaces and textiles. BioZap penetrates into pores and provides long-lasting protection.

All-Natural Air Purifiers

BioZap Air Purifier & Deodorizer for musty basement odors.

Avoid unhealthy ozone or synthetic scents that just mask odors. BioZap Air Purifier thoroughly cleans and deodorizes indoor air by slowly releasing organic vapors that break down musty odors in the air.

Water & Radon Test Kits

Moisture Vapor and Radon Gas test kits. Easy-to-use vapor kits that measure vapor transmission and pH of concrete floors. Radon-in-water, short and long-term radon-in-air test kits for radon gas testing.

Emergency Backup Sump Pump

BioZap Air Purifier & Deodorizer for musty basement odors.

Water-powered backup sump pumps for worry-free flood protection in your basement. The ingenious design guarantees superior reliability and service life. Ideal for small or busy sump pits.

LastiSeal Brick & Concrete Sealer

LastiSeal Brick & Concrete Sealer

Long-lasting, natural look, water-based, penetrating sealer for the protection of brick, mortar, concrete, pavers, limestone, grout, and porous masonry.

Read More

How to Repair Basement Wall Cracks.

Waterproofing CMU Walls

Concrete blocks are much more permeable to water and water vapor in comparison to poured concrete. Learn how to properly waterproof them from the inside/out. 

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Radon Mitigation Methods

There is no “safe level” of this radioactive gas in homes and homeowners should always strive to reduce its concentration to a minimum.

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Make Your Wet Basement Dry

When trying to repair a wet basement or alleviate a damp one, you might get stuck in an endless cycle of waterproofing “fixes” that consume more time and more money.

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How to Repair Basement Wall Cracks.

Efflorescence; Cause and Prevention

What is efflorescence, what causes it, and how to prevenet efflorescence from reappearing?

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Radon Gas Infiltration

Radon is an invisible and odorless radioactive gas. Elevated levels of radon have been found in homes all across the country. Any home in any state may have a radon problem.

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Basement Waterproofing

Wet, damp, and humid basements are the most frequent complaint we hear from homeowners. Traditional, decades-old basement waterproofing methods have not passed the test of time because water always wins. 

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