---
product_id: 23752537
title: "RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft | Low-Viscosity Urethane Injection for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free"
brand: "radonseal"
price: "€ 646.10"
currency: EUR
in_stock: true
category: "Radon Seal"
url: https://www.desertcart.hr/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20
store_origin: HR
region: Croatia
---

# 24-hour full cure time Waterproof urethane sealant Drill-free injection tech RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft | Low-Viscosity Urethane Injection for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free

**Brand:** radonseal
**Price:** € 646.10
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal smart, live dry — protect your foundation like a pro!

## Quick Answers

- **What is this?** RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft | Low-Viscosity Urethane Injection for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free by radonseal
- **How much does it cost?** € 646.10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20)

## 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

- • **Radon & Soil Gas Barrier:** Shield your basement environment from harmful gases while sealing cracks.
- • **Interior-Only Application:** Save thousands by repairing from inside—no excavation needed.
- • **Effortless Drill-Free Repair:** Fix foundation cracks without damaging your walls or tools.
- • **Precision Low-Viscosity Formula:** Injects smoothly with any standard caulking gun for a flawless seal.
- • **Permanent Hairline Crack Protection:** Stops water leaks and prevents costly structural damage.

## Overview

The RadonSeal DIY Foundation Crack Repair Kit offers a drill-free, low-viscosity urethane injection system designed for easy, permanent sealing of hairline cracks in concrete basement walls and crawl spaces. With a 24-hour cure time, waterproof performance, and added protection against radon and soil gases, it enables interior repairs that save on costly excavation while maintaining your home's structural integrity.

## Description

RadonSeal DIY Foundation Crack Repair Kit (20 ft) Low-Viscosity Urethane Injection Sealant for Crawl Spaces & Concrete Basement Walls - Stops Water Leaks - Drill-Free Filler: desertcart.com: Tools & Home Improvement

## Features

- Drill-Free Injection: Repair basement wall cracks effortlessly without drilling, ensuring minimal disruption to your home's structure.
- Simple Application: Use a standard caulking gun to inject the low-viscosity, 2-component urethane, making the process accessible for any homeowner.
- Effective Hairline Crack Repair: Seal even the smallest cracks permanently with the specialized urethane, preventing further water seepage and damage.
- Interior Repair Advantage: Save on costly excavation by repairing cracks from inside your basement, maintaining exterior aesthetics and structural integrity.
- Comprehensive Protection: This solution not only protects against water but also acts as a barrier against radon and soil gases, safeguarding your basement environment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00II7JOHM |
| Best Sellers Rank | #114,368 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #350 in Wall Surface Repair Products |
| Brand Name | RadonSeal |
| Color | Grey |
| Customer Reviews | 4.6 4.6 out of 5 stars (189) |
| Full Cure Time | 24 Hours |
| Included Components | Surface Sealer, Injection Foam, Ports, Accessories |
| Item Form | Expanding CLosed-Cell Foam |
| Manufacturer | Novion |
| Material Type | Polyurethane |
| Maximum Gap Fill | 0.5 Inches |
| Model | 303 |
| Number of Items | 1 |
| Part Number | 303 |
| Surface Recommendation | Poured Concrete Walls, Leaking Form Ties, Cove Joints |
| UPC | 856255006607 |
| Unit Count | 1.0 Count |
| Water Resistance Level | Waterproof |

## Product Details

- **Brand:** RadonSeal
- **Color:** Grey
- **Full Cure Time:** 24 Hours
- **Item Form:** Expanding CLosed-Cell Foam
- **Maximum Gap Fill:** 0.5 Inches

## Images

![RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft | Low-Viscosity Urethane Injection for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free - Image 1](https://m.media-amazon.com/images/I/81hTwgRHm0L.jpg)

## Questions & Answers

**Q: How many ports are included in this 20 foot kit?**
A: 30 ports

**Q: Can this product be used to repair wider cracks occurring in stem walls of raised foundations?**
A: We recommend that homeowners only use the kits on cracks up to 1/2" wide. Anything wider we would recommend you contact us first for consultation or hire a crack repair specialist.

**Q: Can you apply product on a wall that is actively leaking**
A: No. If the crack is actively leaking water, you must wait for it to subside before beginning urethane injection.

**Q: Does kit come with both corner and flat ports?**
A: The kit include only flat surface ports. If you need a kit with corner ports, please contact us directly.

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**Shop now:** [https://www.desertcart.hr/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20](https://www.desertcart.hr/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-01*