---
product_id: 741693141
title: "Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler"
brand: "radonseal"
price: "3527 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/741693141-complete-diy-foundation-crack-repair-kit-10-ft-low-viscosity
store_origin: DK
region: Denmark
---

# Expands to fill 10 ft. cracks Waterproof & radon-blocking seal Drill-free injection tech Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler

**Brand:** radonseal
**Price:** 3527 kr
**Availability:** ✅ In Stock

## Summary

> 🛡️ Seal cracks like a pro—stop leaks and radon before they start!

## Quick Answers

- **What is this?** Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler by radonseal
- **How much does it cost?** 3527 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/741693141-complete-diy-foundation-crack-repair-kit-10-ft-low-viscosity)

## 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

- • **Durable & Flexible Seal:** Expands and moves with your foundation to prevent future leaks and cracks.
- • **Radon & Moisture Defense:** Hydrophobic, flexible foam blocks water, soil gases, and harmful radon gas.
- • **Trusted by Professionals:** Used by waterproofing contractors for reliable, long-lasting foundation protection.
- • **Advanced Low-Viscosity Urethane:** Penetrates hairline cracks deeply for a permanent, watertight seal.
- • **Effortless Drill-Free Application:** No drilling needed—just a standard caulking gun for pro-grade repairs.

## Overview

The RadonSeal Complete DIY Kit uses a two-part expanding urethane foam to permanently seal up to 10 linear feet of foundation cracks without drilling. Its low-viscosity formula penetrates hairline cracks, creating a flexible, waterproof barrier that blocks water, soil gases, and radon. Trusted by professionals, this easy-to-apply system ensures durable, long-lasting protection for crawl spaces and basement walls.

## Description

Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler

## Features

- Drill-Free Crack Repair: Advanced two-component low-pressure injection creates a durable, watertight seal that permanently repairs hairline cracks from the inside, eliminating the need for expensive repairs.
- Heavy-Duty Coverage: Low-viscosity urethane is specifically formulated to penetrate and seal even the smallest hairline cracks, ensuring a long-lasting permanent seal.
- Water-Resistant Seal: Formulated to remain flexible, accommodating natural concrete movement while its hydrophobic properties repel water, soil gases, and even radon, preventing shrinkage and deterioration over time.
- Easy to Apply: Easily apply the low-viscosity, two-component urethane using a standard caulking gun for professional-grade crack repairs with minimal effort.
- Trusted Quality: Engineered for professional-grade performance, RadonSeal products are proven to provide reliable quality and durability, ensuring strong, lasting results for foundations, walls, basement floors, and more.
- Use What the Pros Use: Save time & money using the same expanding foam crack filler used by waterproofing contractors.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Part number | 301 |
| Material type | 2-Part Expanding Urethane Foam |
| Manufacturer | Novion |
| Item model number | 301 |
| ASIN | B006OP30L6 |

## Product Details

- **Colour:** Grey
- **Brand:** RadonSeal
- **Liquid volume:** 22 Fluid Ounces
- **Item form:** Foam
- **Maximum gap fill:** 0.5 Inches

## Images

![Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler - Image 1](https://m.media-amazon.com/images/I/71RcxOEaVML.jpg)
![Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler - Image 2](https://m.media-amazon.com/images/I/81IxiEno0bL.jpg)
![Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler - Image 3](https://m.media-amazon.com/images/I/81KAxHgyxIL.jpg)
![Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler - Image 4](https://m.media-amazon.com/images/I/81fyiwIYvdL.jpg)
![Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler - Image 5](https://m.media-amazon.com/images/I/81+79aJJL9L.jpg)

## Questions & Answers

**Q: Is this strong enough to "push back" toward the exterior of the wall? ie, is it better than the products where you drill behind the crack?**
A: Ben - I am not an expert by any means - but I can tell you my experience.  This is a low pressure product - meaning that the "pressure" comes from VERY slow use of a caulk gun.  That being said - this is an expanding foam type of product - it goes in as a very thin liquid and once activated foams and flls the crack - even hair line ones.   The directions say that as long as you are below grade you do not have to seal the outside - well apparently the very top of our crack was above grade - when I went outside I could see the product had foamed to the outside.  This means it went from a small hailine crack - through the wall  - all the way to the exterior wall.  I used this product to fill two areas with cracks  that had leaked for a long time.  It's been a few months now - and lots of rain - and we are still very dry.  No drilling was required.  I hope this helps.

**Q: Can u use this product will water actively coming out of the wall or does it need to be dry? Once the solution is applied. do u need to wet the wa**
A: Foundation cracks cannot be repair while actively leaking. The surface sealer and port adhesive requires a dry surface to properly cure and adhere. The injection foam can be used when the crack is wet. In fact, part if the injection process includes injecting water to assist in the foam expansion.

**Q: What is the size of the port adhesive containers? eg ounces**
A: Each jar is 8-ounces or .25 quarts.

**Q: Have several cracks, some are substantial size, how much surface area does this kit cover?**
A: ONE (1) RadonSeal® DIY Crack Injection Kit roughly fills 8-10 linear feet of cracks in poured concrete walls, from hairline to 1/2" wide. If there is a large void behind the wall or the urethane wastefully runs down towards the footings, it can consume more polyurethane foam, typically in the lowest injection port. You can order additional cartridges by calling RadonSeal®. Twenty-foot kits are available on Amazon®.

## Frequently Bought Together

- RadonSeal Complete DIY Foundation Crack Repair Kit - 10 Ft - Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free Filler
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- Applied Technologies 6-10' Fast Set Concrete Foundation Crack Repair Kit - Hydra Stop 300 Polyurethane Foam for Wall Cracks, Prevents Basement Flooding, Quick-Setting Waterproof Sealing Solution

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**Shop now:** [https://www.desertcart.dk/products/741693141-complete-diy-foundation-crack-repair-kit-10-ft-low-viscosity](https://www.desertcart.dk/products/741693141-complete-diy-foundation-crack-repair-kit-10-ft-low-viscosity)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-28*