radonseal.com

4.6
4.6 Based on 1.2K reviews

It happens to thousands of homeowners each year – the sale of their home falls through because of high radon in their basement. They have to hustle to get a radon mitigation system installed and hope that the buyer will not walk away. But for many years a...

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Average Rating

4.6

/
5

1.2K Reviews

5 Star
78%
4 Star
11%
3 Star
4%
2 Star
3%
1 Star
5%

All Reviews

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Very

Very. Prompt I

5
Date of experience: Oct 27, 2025
Richard Howell
White Spots Remained.

I used the product on my patio per the instructions. After the product dried it left white patches and looked terrible. I contacted the manufacturer and they suggested using an Etcher to remove the effervescence. The Etcher and scrubbing with a broom did not work. The radonseal was expensive and doesn't look good. It required extra expense, time and work. The result is not satisfactory and I would not recommend the product.

1
Date of experience: Oct 26, 2025
John Burch
The rep I worked with went out of their…

The rep I worked with went out of their way to ensure that my product arrived in time for application in our new build schedule.

5
Date of experience: Oct 14, 2025
Daphne
RadonSeal sounds great

It was easy to find what we needed.

5
Date of experience: Oct 14, 2025
Dennis
Easy to order

5
Date of experience: Oct 10, 2025
S&S Maintenance Services
Great products!

I have used RandonSeal products on several jobs. They are easy to use and get the job done correctly, the first time! I won’t use anything else!

5
Date of experience: Oct 07, 2025
Jeremy Phillips
You are a great company to deal with

You are a great company to deal with - thank you!

5
Date of experience: Oct 07, 2025
Melvin Roberts
Product worked perfectly!

Product worked perfectly!! Highly recommend to diyer’s.

5
Date of experience: Oct 01, 2025
customer joe
Proper product for the job.

Very good advice. Helpful in making better decisions.

5
Date of experience: Sep 30, 2025
Pam Clark
Product great

Product greatArrived FastCoverage was as described, but I feel I needed several coats...my porch so porous that it drank it right up.End result was just ok but only because I think I picked wrong color and need more coats

5
Date of experience: Sep 29, 2025

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Business Details

  • It happens to thousands of homeowners each year – the sale of their home falls through because of high radon in their basement. They have to hustle to get a radon mitigation system installed and hope that the buyer will not walk away. But for many years after, they may wonder about the long-term effects of the radioactive gas on their children.

    Since radon gas seeps into basements from the ground, the US Environment Protection Agency had tested the obvious solutions back in the 1980's – caulking all cracks and sealing the concrete with various coatings but the improvements were not significant or lasting. Thus, the fan-based system which draws soil gases from underneath basement slabs became the standard.

    There had to be a better way! Novion Inc. was founded in 1987 to pursue innovative high-tech solutions. Penetrating concrete sealers, already well-proven for waterproofing concrete on major projects, seal concrete internally and permanently. Perhaps, they could be improved to penetrate deeper and seal even tighter to keep out the single-atom radon gas.

    After extensive research and testing, the first concrete sealer specifically developed to reduce radon infiltration through concrete was ready for the big debut – RadonSeal® Deep-Penetrating Concrete Sealer. Novion Inc. was incorporated in Connecticut and RadonSeal was made available directly to homeowners and contractors on radonseal.com website.

    Subsequently, we have continued to add unique innovative products, not available in stores, for basements, indoor or outdoor concrete, bricks, pavers, and masonry. Going beyond radon remediation, we provide durable and cost-effective solutions for waterproofing basements, sealing concrete slabs against vapor, and mold remediation. Our products also protect and beautify indoor or outdoor concrete, pavers, and masonry.

    Our mission is to supply cutting-edge, professional-grade, and environment-friendly products, superior to those sold in stores. Our customer support offers technical expertise and objective guidance on the best solutions for customers' needs.

    Whether you are a homeowner, contractor, or building owner, we will provide the top-quality products and service to solve or prevent problems with your basement, parking lot, pool deck, brick or masonry walls.

    It can be just a matter of time before your basement or outdoor concrete starts giving you problems. Act now and give us a call. We are here to help!See more

  • email admin@radonseal.com
  • call 2032250366
  • language https://www.radonseal.com

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