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  • Great product
  • August 28, 2017
  • Recommended Product

Make sure you take your time prepping the floor by cleaning it thouroughly before application. This is a very clear product, almost thought it was water at first!! It should be applied to the floor with a sprayer, let it dry a little and then apply a second time. Once completely dry, scrub floor with water and after a few days once more to remove the purged effervescence that the sealer brings up. Great product, perfect for prepping a belowgrade basement for carpet.

cartier86

23 out of 23 people found this helpful
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By: cartier86
  • Very Satisfied with this product. I used this to seal my slab flooring on my above grade flooring...
  • May 30, 2017
  • Verified Purchase & Recommended Product

Very Satisfied with this product. I used this to seal my slab flooring on my above grade flooring in a section of my home. The main reason was for moisture vapor control reduction (water vapor/higher room humidity) with the added bonus of radon protection. My actual humidity has been reduced by 5%-8%. I followed the directions and the 5 pail covered ~800 sqrfeet. 3 coats. It works !

Jlo

19 out of 19 people found this helpful
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By: Jlo
  • I used it to seal a concrete block wall in...
  • November 01, 2017

I used it to seal a concrete block wall in my basement that was accumulating a lot of moisture when it rains which you could see on the interior side of the blocks. Now when it rains the blocks remain completely dry and my basement doesn't smell musty. i did 3 coats for reference. Def. recommend.

Justin

15 out of 15 people found this helpful
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By: Justin
  • Excellent sealer. Used on my basement slab. No more water seepage. No moisture. I dont run my deh...
  • December 06, 2019
  • Recommended Product

Excellent sealer. Used on my basement slab. No more water seepage. No moisture. I dont run my dehumidifeir anymore. Hard to believe, but its true!

FreshFields

10 out of 10 people found this helpful
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By: FreshFields
  • SIX STARS!! ⭐️⭐️⭐️⭐️⭐️⭐️
  • March 09, 2020
  • Recommended Product

Our third go around with Radonseal and it has been tremendous for both our applications. Our first experience, we had to address an above average radon level for a rental property and contacted a mitigation and indoor air quality company. We received a proposal which included a $950 radon mitigation system, installing a gas tight sump cover, concrete to be sealed (using Radonseal), and repairing two large cracks in the floor. We did not want a coating on the basement floor but the company assured us that it would not leave a coating. They explained that sealing the concrete is beneficial and they have been using Radonseal for years in basements to help reduce radon levels and improve the air quality. Well, it worked amazingly! The surface looked exactly the same, the way the they said it would. What surprised us the most was how dry the basement felt!! A bonus for the property and our renters. It worked so well that we used it in our home (split ranch). A new boiler was installed incorrectly in our home and we had a puffback in the house. Long story short, we had to rip out the carpeting on the lower level slab and noticed that the padding underneath was moist in several areas, not to mention the rank smell. After reading about potentially having to use acid to etch the concrete, we called Radonseal. They were knowledgeable and thorough with asking us questions about the concrete, the conditions, moisture and going over the application with us. They definitely told us to spot test in two areas first to make sure the sealer would absorb. We did and it was absorbing because the concrete looked the same after it dried. There appeared to be some old adhesive strips on the floor and for the life of me I couldn't remove. There weren't many and they told us it wouldn't be a huge problem if you went over it. Results.....DRY AGAIN! Now I am using it for a dusty garage floor and efflorescence. The concrete has always been in terrible shape and my wife and I are sick of the kids tracking dust into the house. I have zero doubt about this companies products and i have learned there is more to this than just applying any old sealer. You need to be applying the right sealer for the right purpose. Great company + great products

ThePearls

7 out of 7 people found this helpful
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By: ThePearls
  • Package arrived ontime but it was pretty beat-up. Not the sellers fault but it was roughly handle...
  • December 19, 2019
  • Recommended Product

Package arrived ontime but it was pretty beat-up. Not the sellers fault but it was roughly handled during shipping, thats for sure. I have used this product on several of my rental properties. It is very good at reducing moisture that comes thorugh the concrete. When our cabins open for the season, the ones i have treated with RadonSeal do not feel as damp and do not have a musty odor. So far, I have done 5 of the 7 units, and i have no complaints.

Bushman

6 out of 6 people found this helpful
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By: Bushman
  • I used RadonSeal Plus to seal my basement floor from...
  • June 04, 2019

I used RadonSeal Plus to seal my basement floor from excess moisture. The product was applied according to instructions, and application went quickly. The basement is less humid than is was, even though I know there is water below the floor because the sump pump is pumping water regularly.

Mark

4 out of 4 people found this helpful
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By: Mark
  • RadonSeal Plus meet all my expectations. It performed exactly as...
  • June 18, 2019

RadonSeal Plus meet all my expectations. It performed exactly as it was described.

krooney

4 out of 4 people found this helpful
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By: krooney
  • EASY TO APPLY, A REAL BUMMER...
  • August 21, 2018

EASY TO APPLY, A REAL BUMMER TO CLEAN THE RESIDUE IT PRODUCES.

spidy

3 out of 3 people found this helpful
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By: spidy
  • I applied 3 light coats to a 1950's 3" thick...
  • April 16, 2019

I applied 3 light coats to a 1950's 3" thick basement slab. The concrete was mechanically ground before the coats. There is definitely less moisture coming up through the floor. Humidity has dropped from about 50% to 40%. Still doing too much work down there so haven't been able to test radon level

basementia

2 out of 2 people found this helpful
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By: basementia