Permanently seal, strengthen, and protect your concrete
Seals against water seepage, water vapor, and even radon gas
Safe and easy to apply, spray or roll-on application
out of 30 reviews
57% recommend this product
Showing 1-10 of 30 reviews
Apr 17, 2020
Somthing went wrong, followed instrution and it didn’t turn out like what it says, stain still show after the sealed
Jan 5, 2018
I monitored my radon levels with an electric radon detector for over a month and it stayed right ...
I monitored my radon levels with an electric radon detector for over a month and it stayed right around 11 for long term and 7 day readings. After following the application steps better than most probably can (I had a very clean floor to begin with) for my entire unfinished basement floor (applying 2 "wet on wet" coats) and filling all cracks after the application, my levels remain at 11. This did absolutely nothing to help with radon levels. I took a risk on buying two buckets so I could do the recommended 2 coats everywhere and it was a bust. Also, it's been 3 weeks since applying the two coats with no change whatsoever in radon levels for the entire 3 weeks.
Response from RadonSeal Tech SupportJan 10, 2018
Its quite surprising that after repairing all your cracks and sealing your foundation and slab with RadonSeal, you saw no change to your radon levels. Where else could the radon be entering your basement? Sump pit? Floor drains? I would be interested in talking about your situation in more detail. Please call when you have time to discuss. 800 472 0603
Dan R. RadonSeal
15 people found this helpful
Feb 17, 2021
So far, the application appears to have improved the dampness...
So far, the application appears to have improved the dampness situation considerably. However, we have not had any of the heavy rains like we experienced in early January, so the jury is still out for a bit longer until we get more rain and see if the desired waterproofing effect is in fact effective.
Jan 15, 2021
Used this product on CMU basement walls and radon avg dropped from 18 to 3.6 in 1 week and has be...
Used this product on CMU basement walls and radon avg dropped from 18 to 3.6 in 1 week and has been consistently staying in the 3's since.
Hard to tell. I saw white powder residue ... going to water seal over in white
Jun 29, 2020
This product did not work for block foundation
I purchased RadonSeal Plus Concrete Sealer and I followed the instructions. The product didn't work. It did nothing for seeping water with my block foundation. Apparently based on the reviews it works for some but customer service was rude when I reached out. I wouldn't recommend