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Model #110

Plus 5 Gal. Deep Penetrating Concrete Sealer for Foundations and Basement Floors

$27046
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  • Helps to stop moisture transmission, water seepage, and radon gas
  • Safe to apply, non-hazardous formulation
  • Works on both horizontal and vertical surfaces
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Product Details

RadonSeal Deep-Penetrating Concrete Sealer seals poured concrete and concrete blocks deeper and tighter than any other sealer on the market. The best basement sealer for your foundation walls and concrete floor against water seepage, vapor transmission and even radon gas. RadonSeal penetrates deep into concrete and reacts, sealing and preserving it permanently. Negative-side hydrostatic water pressure cannot budge it. It reduces basement humidity, prevents musty odors and basement molds. RadonSeal is the only basement sealer backed by a lifetime money-back guarantee against radon. It does not change the surface of the concrete. Treated surfaces remain suitable for paints, adhesives and overlays. Seal your concrete before painting it or installing flooring to avoid trapping moisture. Make sure to seal the basement walls and floor before finishing the basement to avoid water damage. RadonSeal prevents efflorescence and reduces concrete dusting, spalling and cracking. It cannot peel, fade or wear off. Results are permanent, no need for re-application. Safe and easy spray-on application, non-hazardous formulation, water-based sealer with zero VOC's. Trusted by contractors, building owners and DIY homeowners for more than 20-years.
  • Stop water seepage, moisture transmission and radon gas in 1 application
  • Safe and easy to apply, non-hazardous, no odor, dries quickly
  • Use on vertical and horizontal surfaces, indoors or out
  • Will not change the look or feel of your concrete, treated surface remain suitable for paints, tiles, adhesives and overlays
  • Return Policy

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

119Questions
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Q:I have a cinder blocks foundation for my garage and every time it rains water is getting into my garage. Can this product be use on cinder blocks to prevent water from coming in?
by|Jan 3, 2023
1 Answer
Answer This Question

A:  Cinder blocks are very difficult to seal from the inside. They are vey porous and let water pass through easily. If you can seal form the outside, then use LastiSeal Brick & Concrete Sealer. Preventing water from getting into the block is the best method to preventing seeping on the inside. If the outside is painted or below-grade, then sealing from the inside is the only option. For cinder block, you should use RadonSeal PLUS followed by Ion-Bond Armor 10-days later. This is the most reliable way to seal cinder block against moisture transfer from the negative-side. This process will not prevent water seepage from cove-joints, cracks, or gaps. We have several detailed articles on our website that discuss cinderblock foundation. Definitely worth the read.

by|Jan 4, 2023
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    Q:My new basement concrete slab was poured 2 days ago. How long do I have to wait before using this product?
    by|Dec 11, 2022
    1 Answer
    Answer This Question

    A:  Thank you for the question. RadonSeal can be applied 3 hours after the concrete has been poured, but we recommend waiting 28 days before applying the sealer. This will allow the pores and capillaries of concrete to fully develop while it cures. Cheers, ---------- Craig - Product Tech RadonSeal

    by|Dec 12, 2022
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      Q:if I'm planning on epoxy-ing after using this product and need to acid etch, will it harm the product if I acid etch AFTER application (and waiting the ten days)
      by|Dec 8, 2022
      1 Answer
      Answer This Question

      A:  Thank you for your question! Acid etching not only will help create a proper surface profile for the epoxy coating but will also enlarge the pores of the concrete. This helps the concrete absorb RadonSeal internally, deep below the surface, so that it will not interfere with the bond of paints, epoxy, adhesive, and similar. Acid etch the concrete. Neutralize the acid/rinse with water thoroughly. Let the concrete dry for 2-3 days. Apply RadonSeal Penetrating Concrete Sealer (we recommend a quick test spot to ensure the concrete is properly absorbing the sealer). Erring on the side of caution, wait 7-10 days before applying coatings to the surface. Cheers, ---------- Craig - Product Tech RadonSeal

      by|Dec 8, 2022
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        Q:can i use it to line interior of a septic tank to prevent corrorsion
        by|Nov 19, 2022
        1 Answer
        Answer This Question

        A:  RadonSeal is for clean, dry, and porous concrete. This is a penetrating sealer, not a coating or liner. If the conditions for application are met, then it can be used. It will seal, neutralize, and strengthen, concrete preventing damage caused by rebar corrosion/expansion.

        by|Nov 21, 2022
          Showing 1-4 of 119
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          Customer Reviews

          4 out of 5
          (76)
          • 4
            out of 76 reviews
          • 79%recommend this product
          Filter by:
          Showing 1-10 of 76 reviews
          Effective seal
          I noticed elimination of smell and dampness in my basement after application to my basement floor. I prepped surface removing efflorescence as best I could and etched using non-toxic etching liquid and put 2nd coat 30 minutes after first coat and swept with broom after each coat followed buy light spray of water after the last coat and one more broom sweep. It’s been about three weeks now and everything good. Noticed some purge of efflorescence after first few days as expected. I recommend.
          by
            • Recommended
            2 found this review helpful
            Easy to use and coats well.
            Easy to use and coats well.
            by
            • Verified Purchase
            • Recommended
            3 found this review helpful
            Effective against low levels of moisture and radon
            I did a bunch of research ahead of finishing my basement. I have a poured concert foundation and it tends to get humid in the summer (70%) and sometimes sweat. I ran a dehumidifier constantly. Efflorescence was everywhere and I had moderately low levels of radon (averaging 2.5 pci/l). This product has been great. It does take a bit of prep work but totally worth it. Radon levels dropped almost immediately to 0.7 pci/l and humidity is now <50%
            by
              • Recommended
              by
              • Verified Purchase
              Great product
              Excellent product. Used it to seal a new basement floor. Easy to apply and it covers well. It exceeded my expectations!
              by
              • Verified Purchase
              Great Product
              Product worked as advertised. After 10 days cure time, tested RadonSeal treated floor by taping plastic to floor…No moisture after leaving covered area for 48 hours. Application was very easy. Please note that the surface of treated floor will still absorb a bit of water. RadonSeal is not a surface sealer all the magic occurs below the surface of the concrete.
              by
              • Verified Purchase
              • Recommended
              1 found this review helpful
              Seems to have stopped the water from seeping through the...
              Seems to have stopped the water from seeping through the basement floor. Have had several rains and basement is dry.
              by
              • Verified Purchase
              I have not tested the Radon levels after application, so...
              I have not tested the Radon levels after application, so I can only speak to the application. The coating of the concrete floor was easy. I used a 2G sprayer and first wet the floor after having cleaned the concrete. While still moist, the coating is applied to the concrete using the same sprayer. I did two heavy coats. Let it dry as per the instructions, and swept the floor again and removed some dust that formed or maybe was left from before. It was a little sticky during the application, so I recommend not walking on it while applying this coating to the floor. It dried relatively quickly. As far as the application process, this is highly recommended.
              by
                1 found this review helpful
                Great Stuff
                Goes on easy and dries fast
                by
                • Verified Purchase
                • Recommended
                1 found this review helpful
                by
                  Showing 1-10 of 76 reviews

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                  Paint/Stain FeaturesMildew Resistant,Mold Resistant,Tintable,UV/Fade ResistantAbrasion Resistant,Algae Resistant,Any Angle Spray,Chemical Resistant,Densifier,Dries Clear,Driveable Surface,Durable,Fast Drying,High Foot Traffic,Inverted spray ability,Low OdorAbrasion Resistant,Any Angle Spray,Chemical Resistant,Densifier,Dries Clear,Driveable Surface,Durable,Fast Drying,High Foot Traffic,Low OdorAbrasion Resistant,Algae Resistant,Chemical Resistant,Dries Clear,Driveable Surface,Durable,High Foot Traffic,Low Odor
                  Surface LocationBasement Wall,Exterior Wall,Foundation,Garage Wall,PoolBasement Floor,Basement Wall,Driveway,Exterior Wall,Foundation,Garage Floor,Garage Wall,PatioBasement Floor,Basement Wall,Driveway,Exterior Wall,Foundation,Garage Floor,Garage Wall,Patio,Pool DeckBasement Floor,Basement Wall,Driveway,Exterior Wall,Garage Floor,Patio,Pavers,Pavers
                  TransparencySolidClearClearTransparent
                  Base MaterialAcrylicOtherWater BasedWater Based
                  Interior/ExteriorExterior,InteriorExterior,InteriorExterior,InteriorExterior,Interior
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