---
product_id: 743459849
title: "Plus Outdoor/Indoor Concrete Deep Penetrating Protectant Sealer, Reduces Moisture, Strengthens, & Reduces Radon Gas Levels, 5 Gallon Bucket"
brand: "radonseal"
price: "€ 738.16"
currency: EUR
in_stock: true
reviews_count: 5
category: "Radon Seal"
url: https://www.desertcart.ie/products/743459849-plus-outdoor-indoor-concrete-deep-penetrating-protectant-sealer-reduces-moisture
store_origin: IE
region: Ireland
---

# Blocks moisture & radon gas 4" deep concrete penetration Permanent, no reapplication Plus Outdoor/Indoor Concrete Deep Penetrating Protectant Sealer, Reduces Moisture, Strengthens, & Reduces Radon Gas Levels, 5 Gallon Bucket

**Brand:** radonseal
**Price:** € 738.16
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal the deal on concrete protection and radon reduction—because your space deserves the best!

## Quick Answers

- **What is this?** Plus Outdoor/Indoor Concrete Deep Penetrating Protectant Sealer, Reduces Moisture, Strengthens, & Reduces Radon Gas Levels, 5 Gallon Bucket by radonseal
- **How much does it cost?** € 738.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/743459849-plus-outdoor-indoor-concrete-deep-penetrating-protectant-sealer-reduces-moisture)

## 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

- • **Eco-Friendly & Safe:** Zero VOCs, non-toxic, solvent-free, and non-flammable formula for worry-free indoor/outdoor use.
- • **Deep Concrete Defense:** Penetrates up to 4 inches to seal pores and capillaries, locking out moisture and radon gas.
- • **Effortless Application:** No special tools needed—just spray or roll on for a quick, permanent seal.
- • **Trusted Commercial Grade:** Backed by 25+ years of proven performance and a money-back guarantee.
- • **Concrete Strength Booster:** Hardens and protects against dusting, efflorescence, freeze-thaw damage, and chemical corrosion.

## Overview

RadonSeal Plus is a commercial-grade, water-based concrete sealer that penetrates deeply (up to 4") to permanently block moisture, radon gas, and soil vapors. It strengthens concrete by reducing dusting, efflorescence, and damage from salts and freeze-thaw cycles. With zero VOCs and a non-toxic formula, it’s safe for indoor and outdoor use. One easy application provides lasting protection without peeling or fading, making it the go-to solution for basement waterproofing and radon mitigation since 1997.

## Description

RadonSeal Plus - Basement Waterproofing and Radon Mitigation for Concrete Surfaces. Superior protection for your concrete with RadonSeal Plus, a deep-penetrating silicate waterproofing concrete sealer designed for long-lasting, permanent protection against water, moisture, dampness, and radon gas. Ideal for basement floors, foundation walls, crawlspaces, garage floors, driveways, sidewalks, concrete pool decks, concrete blocks, and cinder blocks, RadonSeal Plus ensures your surfaces stay dry and secure. RadonSeal Plus chemically reacts with Portland cement to block the capillaries and pores in concrete, concrete blocks, and cinder blocks, creating a barrier that blocks water infiltration, soil gases, and harmful radon gas. It also helps reduce humidity, eliminate musty odors, and reduces dampness in basement areas. Additionally, RadonSeal Plus strengthens and hardens concrete, offering protection against cracking, efflorescence, freeze-thaw damage, and the damaging effects of road salts and deicing chemicals. Whether applied to your basement, garage floor, or concrete driveway, this high-performance sealer preserves concrete surfaces against tough conditions. With a zero VOC, solvent-free, non-toxic, and non-flammable formula, RadonSeal Plus is an eco-friendly solution that’s safe for your family and the environment. Its easy-to-use application via handheld sprayer or roller makes protecting your concrete simple. Just one application provides permanent protection, eliminating the need for costly reapplications. Choose RadonSeal Plus for a clear sealer that enhances concrete durability, protects against water damage, and strengthens your surfaces—offering peace of mind in basement waterproofing, radon reduction, and concrete protection.

Review: This product arrived very quickly, it was exactly what we had expected. We definitely would buy it again if needed.
Review: Great Product, it works as described. make sure you clear out all your stuff from walls and floors to make it easier to apply. It's literally as simple as spraying water, just get a pump sprayer (not a used one with bug chemicals in it), use the sprayer to dampen the floor/wall with water, then use the sprayer to coat the floor/walls with radon seal, before it drys recoat with radonseal again....easy! My basement was floating around 13+ for Radon measure by an electronic radon meter, I applied the radon seal and vented the basement for over a week and used a dehumidifier to get the moisture out and help dry. After I closed the basement back up I'm now around 8 for radon, but the high levels I'm sure are because I still need to cover my sump pump pit which has open dirt around it and my radon tubes don't have fans yet, so I still have some work to do but the area where my carpet is at and the exposed walls I feel i don't have to worry about since I put radon seal down before they installed the floor.

## Features

- Penetrates Concrete (Up to 4"): Internally seals the matrix of concrete, blocking the pores and capillaries to reduce water seepage, water vapor, and radon gas. Ideal for use on basement floors, foundation walls, slab-on-grade, indoor and outdoor poured concrete slabs and walls.
- Hardens & Strengthens Concrete: Protects against and reduces concrete dusting, efflorescence, damage caused by salts, de-icing chemicals, and freeze thaw. Does not trap moisture.
- Easy-to-Apply Formula: No special tools required. Zero VOCs, no odors, no solvents, non-toxic, non-flammable. Water-based.
- Permanent: No reapplication needed. Resistant to hydrostatic water pressure. Does not form a surface film. No peeling or fading.
- Commercial-Grade & Backed by a Money-Back Guarantee: Trusted since 1997.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B013P3QE1W |
| Item model number | 110 |
| Manufacturer | Novion |

## Product Details

- **Brand:** RadonSeal
- **Item form:** Liquid
- **Material:** Blended Silicate
- **Style:** PLUS
- **Water resistance level:** Waterproof

## Images

![Plus Outdoor/Indoor Concrete Deep Penetrating Protectant Sealer, Reduces Moisture, Strengthens, & Reduces Radon Gas Levels, 5 Gallon Bucket - Image 1](https://m.media-amazon.com/images/I/813Y88E6qnL.jpg)

## Questions & Answers

**Q: can this be used on concrete roofs where the rain water is channeled to a storage cistern for drinking water?**
A: Yes, RadonSeal can be used for this application. No problem. There is no concern about leaching or water contamination.

**Q: How well does this work for seepage between the floor and foundation wall?**
A: Very well. Used it once on walls and floor never saw any wetness after that?

**Q: Can this be used over painted basement walls**
A: RadonSeal is a penetrating sealer. This type of product can only be applied to bare & porous surfaces. All paints, previously applied sealers, and other materials that may prevent sealer penetration should be completely removed before treatment.

**Q: Can this product eat away at a basement concrete floor causing solf spots, chipping and cracking. is it possible if over used that it may destroy the**
A: Not at all. My floor and walls are stronger then ever. It purges out dirt and loose dust when first applied but stengthens the concrete after it cures.I think the curing process takes a couple of days to a week. I just swept and washed the dirt away

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***N on 9 February 2020*

This product arrived very quickly, it was exactly what we had expected. We definitely would buy it again if needed.

### ⭐⭐⭐⭐⭐ Review
*by S***N on 31 July 2013*

Great Product, it works as described. make sure you clear out all your stuff from walls and floors to make it easier to apply. It's literally as simple as spraying water, just get a pump sprayer (not a used one with bug chemicals in it), use the sprayer to dampen the floor/wall with water, then use the sprayer to coat the floor/walls with radon seal, before it drys recoat with radonseal again....easy! My basement was floating around 13+ for Radon measure by an electronic radon meter, I applied the radon seal and vented the basement for over a week and used a dehumidifier to get the moisture out and help dry. After I closed the basement back up I'm now around 8 for radon, but the high levels I'm sure are because I still need to cover my sump pump pit which has open dirt around it and my radon tubes don't have fans yet, so I still have some work to do but the area where my carpet is at and the exposed walls I feel i don't have to worry about since I put radon seal down before they installed the floor.

### ⭐⭐⭐⭐⭐ Review
*by C***Y on 23 December 2020*

Seemed to work just fine. Follow the directions.

## Frequently Bought Together

- RadonSeal Plus Outdoor/Indoor Concrete Deep Penetrating Protectant Sealer, Reduces Moisture, Strengthens, & Reduces Radon Gas Levels, 5 Gallon Bucket
- 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

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ie/products/743459849-plus-outdoor-indoor-concrete-deep-penetrating-protectant-sealer-reduces-moisture](https://www.desertcart.ie/products/743459849-plus-outdoor-indoor-concrete-deep-penetrating-protectant-sealer-reduces-moisture)

---

*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-07*