RadonSeal Plus Deep-Penetrating Concrete Sealer is a water-based, zero-VOC concrete sealer formulated to permanently seal, strengthen, and protect poured concrete, concrete blocks, and limestone. RadonSeal works by penetrating up to 4 inches below the surface and expanding to seal the pores and capillaries that make concrete porous. It waterproofs, hardens, and densifies concrete and withstands both negative and positive-side hydrostatic pressure.
Basement Waterproofing Sealer
The strongest and deepest penetrating basement sealer available. Prevent wet basements, mold and mildew growth, musty odors, high humidity, and water damage to flooring, drywall, and furniture. Deep-seal your concrete slab and foundation walls with RadonSeal before finishing your basement to protect your investment. Surfaces treated with RadonSeal are ready for paints, adhesives, tiles, overlays, epoxy, urethane, or carpeting.
Radon Mitigation
Reduce radon and soil gases from entering homes, schools, or workplaces, and improve indoor air quality. Use RadonSeal as an alternative to radon extraction systems to save thousands of dollars. Already have a fan-based radon reduction system? Use RadonSeal in conjunction with an existing radon extraction system to further reduce radon levels inside your living space. Apply RadonSeal after sealing cracks, gaps, and voids to reduce your radon level below the EPA’s take action level of 4 pCi/L.
Strengthen & Preserve Your Concrete
Permanently strengthens and densifies concrete surfaces. Ideal for outdoor concrete driveways and aprons, parking garages, seawalls, and other surfaces exposed to salt and freeze/thaw cycles. Protects concrete against cracking, dusting, efflorescence, freeze-thaw damage, road salts, and deicing chemicals.
Eco-Friendly & Easy To Apply Formula
Sealing concrete with RadonSeal is an easy and safe way to protect your family and home. RadonSeal is people, plant, and pet safe. Water-based, zero VOC, no odor, no hazardous solvents, non-toxic, non-flammable. For use on interior and exterior surfaces, walls, and floors.
The Permanent Concrete Sealer
RadonSeal penetrates and reacts with alkalis found naturally in concrete to form cementitious mineral inside the pores which are permanent. No reapplication needed, ever. Resistant to hydrostatic water pressure. Does not form a surface film. RadonSeal will not crack, peel, or fade away.
Ideal for use on basement floors, crawl spaces, basement walls, foundation walls, concrete floors, indoor and outdoor poured concrete slabs, and walls.
Lifetime Money-Back Guarantee
Performance unmatched by any other sealer. Trusted Since 1997.
Exclusions: Stamped concrete, integrally colored or acid-stained concrete, polished concrete floors, modified hydraulic cement, fiber-reinforced concrete, exterior split-face or lightweight concrete blocks, bricks, or pavers.
Need Help with Your Project? Our knowledgeable technical support team is just a phone call or email away. We’re here to help you get the job done right.
Fast Shipping: Most orders received by 2:00 PM EST ship the same business day via Ground Delivery. Delivery typically takes 1–3 business days to the East Coast and Central states, and 3–5 business days to West Coast destinations.
