---
product_id: 14333542
title: "RadonSeal Plus Deep Penetrating Concrete Sealer for Basement Walls and Floors, Seals Concrete Against Water, Vapor and Radon Gas, (2.5 Gallons)"
brand: "radonseal"
price: "฿23145"
currency: THB
in_stock: true
reviews_count: 8
category: "Radon Seal"
url: https://www.desertcart.co.th/products/14333542-radonseal-plus-deep-penetrating-concrete-sealer-for-basement-walls-floors
store_origin: TH
region: Thailand
---

# Blocks water & vapor ingress 4-inch deep concrete penetration Permanent, non-film forming seal RadonSeal Plus Deep Penetrating Concrete Sealer for Basement Walls and Floors, Seals Concrete Against Water, Vapor and Radon Gas, (2.5 Gallons)

**Brand:** radonseal
**Price:** ฿23145
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal Smart, Live Safer: The Ultimate Concrete Shield for Your Home

## Quick Answers

- **What is this?** RadonSeal Plus Deep Penetrating Concrete Sealer for Basement Walls and Floors, Seals Concrete Against Water, Vapor and Radon Gas, (2.5 Gallons) by radonseal
- **How much does it cost?** ฿23145 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/14333542-radonseal-plus-deep-penetrating-concrete-sealer-for-basement-walls-floors)

## Best For

- radonseal enthusiasts

## Why This Product

- Trusted radonseal brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted Since 1997:** Commercial-grade quality with proven radon and moisture reduction—join thousands securing healthier homes.
- • **Eco-Safe Indoor Use:** Water-based, zero VOCs, odorless formula keeps your home safe and fresh during application.
- • **Deep Concrete Defense:** Penetrates up to 4 inches to lock out water, vapor, and radon gas—fortify your basement from within.
- • **Invisible Yet Powerful:** Seals concrete without surface films, preserving paintability and aesthetics seamlessly.
- • **Long-Term Durability Boost:** Hardens concrete against dusting, cracking, and chemical damage for lasting structural integrity.

## Overview

RadonSeal Plus is a professional-grade, deep-penetrating concrete sealer designed to protect basement floors and walls by blocking water, vapor, and radon gas up to 4 inches deep. Its water-based, zero-VOC formula ensures safe indoor use without odors, while permanently hardening concrete against environmental damage. Trusted since 1997, it offers a reliable, invisible barrier that preserves concrete integrity and reduces radon levels, making it an essential upgrade for healthier, more durable living spaces.

## Description

RadonSeal Plus Deep Penetrating Concrete Sealer for Basement Walls and Floors, Seals Concrete Against Water, Vapor and Radon Gas, (2.5 Gallons) - desertcart.com

Review: easy to use, significantly lowered both moisture and radon levels in just 30 days - We bought RadonSeal Plus to help reduce radon levels in our home and ensure proper moisture levels in the concrete floor before installing LVP in our partially finished basement. We were surprised to get moisture test readings in the yellow since, as long as we've lived here, our sump pump has remained bone dry and we've had zero visible signs of water intrusion. After several months of monitoring humidity, dewpoint, etc, we concluded water vapor must be wicking up through the concrete. We decided to apply RadonSeal Plus to only the finished room first, since we need the new LVP installed in time for Christmas gatherings. RadonSeal was easy to apply, had little to no odor, and we could see it was being absorbed effectively into the concrete as it was applied. The instructions say it reaches full strength in 60 to 90 days. After 30 days we're pretty happy with the results so far. Our moisture readings have gone from yellow to green with our latest ASTM F1869 test reading 2.14. Our radon readings have gone from regular highs from 10 to 14 over the 3 months prior to the application, to now showing consistent levels between 4 to 6. This is after doing 1/3 of the basement (ONLY the finished area). After the holidays we'll seal the two unfinished areas of the basement and I'll be happy to report the final results here.
Review: Definitely saw lower radon numbers. - Had two rooms downstairs that were not finished just bare concrete. Sprayed all the walls that were in contact with the Earth and sprayed the floors. We already had a radon monitor for years so we knew what the averages were. Our numbers were never high enough to trigger remediation, but it is peace of mind, knowing that they’re even lower now. This definitely brought the radon levels down in conjunction with caulking all cracks first in the floors with radon approved caulk. My recommendation is to do light coats with a pump sprayer. Don’t let the liquid pool. This is not a substitute for homes that have radon levels high enough to require remediation.

## Features

- Effective Concrete Protection: RadonSeal concrete sealer penetrates up to 4 inches, blocking water, vapor, efflorescence, and radon gas from concrete surfaces like basement floors and walls.
- Strengthens and Preserves: Harden concrete against dusting, crazing, and damage caused by salts, de-icing chemicals, and freeze-thaw cycles.
- Environmentally Friendly: Water-based formula with ZERO VOCs, no fumes, solvents, or toxins—safe for indoor use without odors or health concerns.
- Permanent Seal: Integrates with concrete for long-term protection against hydrostatic water pressure, without forming a surface film or compromising paintability.
- Trusted and Guaranteed: RadonSeal offers commercial-grade quality since 1997, ensuring reliability in sealing and preserving concrete structures

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00ITZ9VNU |
| Best Sellers Rank | #159,246 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #378 in Hardware Sealers |
| Brand | RadonSeal |
| Color | White |
| Date First Available | January 17, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 24 pounds |
| Item dimensions L x W x H | 10 x 24 x 10 inches |
| Item model number | 111 |
| Manufacturer | Novion |
| Material | Concrete, Concrete Block |
| Number of Items | 1 |
| Product Dimensions | 10 x 24 x 10 inches |
| Style | Deep-Penetrating Sealer |
| Surface Recommendation | Floors,Walls |
| UPC | 856255006034 |
| Unit Count | 320.0 Fluid Ounces |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** RadonSeal
- **Item Weight:** 24 Pounds
- **Item dimensions L x W x H:** 10 x 24 x 10 inches
- **Material:** Concrete, Concrete Block
- **Style:** Deep-Penetrating Sealer

## Images

![RadonSeal Plus Deep Penetrating Concrete Sealer for Basement Walls and Floors, Seals Concrete Against Water, Vapor and Radon Gas, (2.5 Gallons) - Image 1](https://m.media-amazon.com/images/I/71C7EgA98uL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ easy to use, significantly lowered both moisture and radon levels in just 30 days
*by 2***M on December 10, 2024*

We bought RadonSeal Plus to help reduce radon levels in our home and ensure proper moisture levels in the concrete floor before installing LVP in our partially finished basement. We were surprised to get moisture test readings in the yellow since, as long as we've lived here, our sump pump has remained bone dry and we've had zero visible signs of water intrusion. After several months of monitoring humidity, dewpoint, etc, we concluded water vapor must be wicking up through the concrete. We decided to apply RadonSeal Plus to only the finished room first, since we need the new LVP installed in time for Christmas gatherings. RadonSeal was easy to apply, had little to no odor, and we could see it was being absorbed effectively into the concrete as it was applied. The instructions say it reaches full strength in 60 to 90 days. After 30 days we're pretty happy with the results so far. Our moisture readings have gone from yellow to green with our latest ASTM F1869 test reading 2.14. Our radon readings have gone from regular highs from 10 to 14 over the 3 months prior to the application, to now showing consistent levels between 4 to 6. This is after doing 1/3 of the basement (ONLY the finished area). After the holidays we'll seal the two unfinished areas of the basement and I'll be happy to report the final results here.

### ⭐⭐⭐⭐⭐ Definitely saw lower radon numbers.
*by A***N on January 1, 2026*

Had two rooms downstairs that were not finished just bare concrete. Sprayed all the walls that were in contact with the Earth and sprayed the floors. We already had a radon monitor for years so we knew what the averages were. Our numbers were never high enough to trigger remediation, but it is peace of mind, knowing that they’re even lower now. This definitely brought the radon levels down in conjunction with caulking all cracks first in the floors with radon approved caulk. My recommendation is to do light coats with a pump sprayer. Don’t let the liquid pool. This is not a substitute for homes that have radon levels high enough to require remediation.

### ⭐⭐⭐⭐⭐ Very easy to apply. No odor.
*by J***J on September 3, 2023*

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.

## Frequently Bought Together

- RadonSeal Deep Penetrating Concrete Sealer for Basement Walls and Floors, Seals Concrete Against Water, Vapor and Radon Gas, (2.5 Gallons)
- Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pests, Polypropylene, Translucent White
- RadonSeal Efflorescence Remover - Cleans Efflorescence, Mortar Haze, Lime, and Rust Stains

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-09*