Search  for anything...
RadonSeal

RadonSeal Plus Deep-Penetrating Concrete Sealer (2.5-Gallon) - Basement Waterproofing & Radon Mitigation Sealer | Seals Concrete Against Water, Vapor, and Radon Gas

    • Based on 97 reviews
Condition: New
Checking for product changes
$131.00 Why this price?

Buy Now, Pay Later

As low as $21.83 / mo
  • – 6-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by RadonSeal Basement & Concrete Sealers
Arrives Tuesday, Dec 3
Order within 26 minutes
Available payment plans shown during checkout

Features

  • Penetrates Concrete (up to 4") Internally seals the matrix of concrete, blocking the micro-pores and capillaries to prevent capillary water seepage, water vapor, efflorescence, and radon gas directly through concrete. Ideal for use on basement floors, interior basement walls, foundation walls, slab-on-grade, indoor and outdoor poured concrete slabs and walls.
  • Hardens & Strengthens Concrete Helps to protect and reduce Concrete Dusting, Crazing, Damage Caused by Salts, De-Icing Chemicals, and Freeze Thaw. Breathable, does not trap moisture!
  • ECO-Friendly & Easy to Apply Formula ZERO VOCs, No fumes or Noxious Odors, No Solvents, Non-Toxic, Non-Flammable. Water-based.
  • Permanent & Paintable No Reapplication Needed; the seal becomes integral to the concrete itself. Resistant to Hydrostatic Water Pressure. Penetrating sealer that does not form a surface film; no peeling or fading. Leaves surface Paintable.
  • Commercial-Grade backed by a Money-Back Guarantee - Trusted Concrete Sealer Since 1997

Material: Concrete


Brand: RadonSeal


Style: Compact


Item Weight: 24 Pounds


Compatible Material: Concrete


Is Discontinued By Manufacturer ‏ : ‎ No


Package Dimensions ‏ : ‎ 16 x 10 x 10 inches; 24 Pounds


Item model number ‏ : ‎ 111


Date First Available ‏ : ‎ January 17, 2012


Manufacturer ‏ : ‎ Novion


Best Sellers Rank: #186,130 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #257 in Hardware Sealers


#257 in Hardware Sealers:


Customer Reviews: 4.2 4.2 out of 5 stars 97 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Dec 3

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Very easy to apply. No odor.
I poured it out of the 2 gal container in various areas spreading with a broom on a 43 year old cement basement floor after hand scrubbing first 2 days before. It soaked in well and the reapply 40 min later also did well. Then I took a damp flat mop another 40 min later to get up any still wet areas. No smell at all. I won't know until I finish the total basement floor and test for radon if it helps. It did give a low sheen and I can see that the surface is sealed. ... show more
Reviewed in the United States on September 3, 2023 by J
    • RadonSeal Plus Works Great!
Review Image by Business Writer Business Writer
*Product review* RadonSeal Plus is a terrific product. Followed the directions, used a mask but I think it was unnecessary as no odor. You have to work the product into the concrete with a broom, wet it down as described, and it's terrific. Did my shed which was dusting horribly and now it's perfect, and the concrete floor area inside (shown in picture). Worked equally well on a new slab and a 50-year old slab. Called company once with some questions and they took the time to answer everything and even looked at my pictures! Great product, highly recommend. [This is a real product review from a real customer.] ... show more
Reviewed in the United States on January 14, 2020 by Business Writer Business Writer
    • They asked me to review it
Easy to apply
Reviewed in the United States on December 31, 2023 by Todd Jorgenson
    • efflorescent keeps coming back
I washed the wall with etching acid to clear any efflorescence, wait for the wall to completely dry, then wire brush the wall and vacuum the wall. I misted the wall and spray the product. After 2 times of applying the product, I still see a lot of efflorescence in one spot. This spot has 1/4 inch of crystalline efflorescence before, and it's the same amount after sealing. I washed and brushed the spot again, and applied 2 more times. It's still there. I did a quick brush and wash, and applied Rapid Set Waterproofing Mortar, and it finally get rid of the efflorescence. That make me question if the sealer did anything at all. ... show more
Reviewed in the United States on July 8, 2023 by Ye L.
    • I will follow up to let you know how well it keeps out the vapor and moisture, so far so good
I loved how easy it was to apply and how effective it is to date. It did a wonderful job pulling out the impurities and the concrete is more solid just like it states on the label. The odor isn't bad either.
Reviewed in the United States on May 19, 2018 by LInda Romano
    • Clear
Easy to apply, goes on clear, is not stinky. You can see where it was applied as it has a little bit of a sheen. Pretty pricey but I wanted peace of mind. We did pass our radon test but we also had a mitigation system installed at the same time, so I can't say if this helped or not.
Reviewed in the United States on August 12, 2021 by Kelly Albrecht
    • it works
Recently I bought a house with a shop outbuilding. The concrete floor kept deteriorating to a flour like powder surface just from walking on it. Constant vacuuming to keep the dust in check. I followed the directions for application and this product hardened the concrete such that the surface is no longer turning to powder and I only have to vacuum occasionally for the usual dirt. No flour powder. ... show more
Reviewed in the United States on August 9, 2021 by John M. Nicholas
    • Does not work on basement floor
This product does not work. I have now sprayed it on my basement floor in water seepage area 8 times. Water still seeps through when it rains. The radon plus then forms a white residue that peels up or just remains on floor looking awful. It does not work and leaves a mess.
Reviewed in the United States on December 30, 2019 by Pamela K. Thompson

Can't find a product?

Find it on Amazon first, then paste the link below.