---
product_id: 23752537
title: "RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft"
brand: "radonseal"
price: "R1745"
currency: ZAR
in_stock: true
category: "Radon Seal"
url: https://www.desertcart.co.za/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20
store_origin: ZA
region: South Africa
---

# Waterproof urethane sealant Drill-free injection tech Radon & gas barrier protection RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft

**Brand:** radonseal
**Price:** R1745
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal smart, live dry — the ultimate DIY foundation fix!

## Quick Answers

- **What is this?** RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft by radonseal
- **How much does it cost?** R1745 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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

- • **Dual Protection Barrier:** Stops water leaks and blocks harmful radon and soil gases, safeguarding your basement’s air quality and foundation integrity.
- • **DIY-Friendly Application:** Compatible with standard caulking guns—no specialized equipment required, perfect for the savvy homeowner.
- • **Interior-Only Installation:** Save thousands by repairing from inside your basement—no costly exterior excavation or landscaping disruption.
- • **Effortless Drill-Free Repair:** Fix foundation cracks without damaging your home’s structure or needing power tools.
- • **Professional-Grade Urethane Sealant:** Low-viscosity, 2-component formula ensures deep penetration and permanent sealing of hairline cracks.

## Overview

RadonSeal Complete DIY Foundation Crack Repair Kit offers a drill-free, low-viscosity urethane injection system designed for permanent sealing of basement wall cracks up to 0.5 inches. This professional-grade kit enables interior-only application, saving costly exterior repairs while providing waterproofing and radon gas protection. With a 24-hour cure time and compatibility with standard caulking guns, it’s the go-to solution for millennial homeowners seeking a reliable, cost-effective foundation repair.

## Description

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: 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 | #89,391 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #308 in Wall Surface Repair Products |
| Brand Name | RadonSeal |
| Color | Grey |
| Customer Reviews | 4.6 4.6 out of 5 stars (190) |
| Full Cure Time | 24 hours |
| Included Components | Surface Sealer, Injection Foam, Ports, Accessories |
| Item Form | Expanding CLosed-Cell Foam |
| Item Highlight | Low-Viscosity Urethane Injection for Crawl Spaces & Concrete Basement Walls, Stops Water Leaks & Radon Gas, Drill-Free |
| 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 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 - 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.

---

## 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.co.za/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20](https://www.desertcart.co.za/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-10-06*