--- product_id: 23752537 title: "RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft" brand: "radonseal" price: "2289.34 DT" currency: TND in_stock: true reviews_count: 8 category: "Radon Seal" url: https://www.desertcart.tn/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20 store_origin: TN region: Tunisia --- # Waterproof urethane sealant Drill-free injection tech Radon & soil gas barrier RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft **Brand:** radonseal **Price:** 2289.34 DT **Availability:** ✅ In Stock ## Summary > 🛠️ Seal cracks, stop leaks, and block radon—DIY like a pro! ## Quick Answers - **What is this?** RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft by radonseal - **How much does it cost?** 2289.34 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 - • **Interior-Only Solution:** Save thousands by repairing from inside your basement—no costly exterior excavation needed. - • **Dual Protection Barrier:** Shield your home from water intrusion and harmful radon gas for a safer, healthier basement. - • **DIY-Friendly Application:** Inject low-viscosity urethane with any standard caulking gun—no professional help required. - • **Effortless Drill-Free Repair:** Fix foundation cracks without damaging your home’s structure or needing power tools. - • **Permanent Hairline Crack Seal:** Stop leaks and prevent water damage with a durable, expanding polyurethane formula. ## Overview RadonSeal Complete DIY Foundation Crack Repair Kit offers a drill-free, easy-to-use urethane injection system that permanently seals hairline cracks in concrete basement walls. Designed for interior application, it prevents water leaks and blocks radon and soil gases, saving costly excavation and professional fees. The kit includes all necessary components and cures fully in 24 hours, providing a waterproof, expanding closed-cell foam seal that protects your home’s foundation with a proven, long-lasting solution. ## 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 Review: Relatively easy, permanent fix - This is a great product. If you’re reasonably handy you can DIY it. I repaired two cracks and the results are perfect. No more leaks after heavy rains, freeze/thaw cycles and melting snow. Some tips that helped me: read the instructions several times and watch videos. Then read the instructions and watch more videos. Seriously. This is a permanent fix. Get it right the first time or you could create a permanent mess. Mix the epoxy in small batches. It sets up quick. It also stinks until it cures, so use ventilation. If the crack goes all the way through the foundation to the outside, cover the crack on the outside (above ground) with epoxy or hydraulic cement. This will prevent the polyurethane from leaking out and making a mess. Inject water into all the ports before you start injecting the polyurethane. This ensures the ports are open and the crack is contiguous, and provides water for the polyurethane to react with. Place the pinch valve close to the end of the hose (close to where it connects with the port on the wall). This cuts down on leaks and messes when you change ports. Inject the resin SLOWLY. It doesn't set up real fast, you have time. Watch the next port carefully while injecting. You may see water getting pushed out, or the resin filling the crack before it starts leaking out. Don't place the last port at the very top of the crack and don't completely cover the top of the crack. The resin needs some room to expand. I was surprised that this was something you could DIY. Much cheaper to do it this way and you get a permanent fix. The kit has everything you need. If you need more materials, like an extra tube of resin, you can buy those separately as needed. Review: Works really well, but beware of the smell and mix in small batches. - This stuff really works! Stopped leaky basement cracks that were leaking for years. My only suggestion is to mix up small batches of the epoxy at a time. This stuff hardens very quickly and is difficult to work with. I mixed up too much at a time and it hardened on me. Thankfully I had just barely enough to finish the job. The smell is really strong as well, so try to get some ventilation going. But once it was done, it’s solid, stopped all the leaks and seems like it will hold forever. Saved me thousands in waterproofing th basement. ## 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 | #125,752 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #379 in Wall Surface Repair Products | | Brand | RadonSeal | | Brand Name | RadonSeal | | Color | Grey | | Customer Reviews | 4.6 out of 5 stars 189 Reviews | | 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 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) ![RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft - Image 2](https://m.media-amazon.com/images/I/81IxiEno0bL.jpg) ![RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft - Image 3](https://m.media-amazon.com/images/I/816EKBjs0gL.jpg) ![RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft - Image 4](https://m.media-amazon.com/images/I/81EyuEQ6hxL.jpg) ![RadonSeal Complete DIY Foundation Crack Repair Kit, Urethane Sealant, 20 Ft - Image 5](https://m.media-amazon.com/images/I/81+79aJJL9L.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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Relatively easy, permanent fix *by B***F on October 23, 2024* This is a great product. If you’re reasonably handy you can DIY it. I repaired two cracks and the results are perfect. No more leaks after heavy rains, freeze/thaw cycles and melting snow. Some tips that helped me: read the instructions several times and watch videos. Then read the instructions and watch more videos. Seriously. This is a permanent fix. Get it right the first time or you could create a permanent mess. Mix the epoxy in small batches. It sets up quick. It also stinks until it cures, so use ventilation. If the crack goes all the way through the foundation to the outside, cover the crack on the outside (above ground) with epoxy or hydraulic cement. This will prevent the polyurethane from leaking out and making a mess. Inject water into all the ports before you start injecting the polyurethane. This ensures the ports are open and the crack is contiguous, and provides water for the polyurethane to react with. Place the pinch valve close to the end of the hose (close to where it connects with the port on the wall). This cuts down on leaks and messes when you change ports. Inject the resin SLOWLY. It doesn't set up real fast, you have time. Watch the next port carefully while injecting. You may see water getting pushed out, or the resin filling the crack before it starts leaking out. Don't place the last port at the very top of the crack and don't completely cover the top of the crack. The resin needs some room to expand. I was surprised that this was something you could DIY. Much cheaper to do it this way and you get a permanent fix. The kit has everything you need. If you need more materials, like an extra tube of resin, you can buy those separately as needed. ### ⭐⭐⭐⭐⭐ Works really well, but beware of the smell and mix in small batches. *by W***K on June 9, 2026* This stuff really works! Stopped leaky basement cracks that were leaking for years. My only suggestion is to mix up small batches of the epoxy at a time. This stuff hardens very quickly and is difficult to work with. I mixed up too much at a time and it hardened on me. Thankfully I had just barely enough to finish the job. The smell is really strong as well, so try to get some ventilation going. But once it was done, it’s solid, stopped all the leaks and seems like it will hold forever. Saved me thousands in waterproofing th basement. ### ⭐⭐⭐⭐⭐ Awesome Stuff! *by T***M on February 24, 2020* This product works amazing and the materials are very high end. I do have to say I am a pretty handy do it yourselfer and this was a time consuming moderately difficult task. I learned why the pros charge so much! My project was a big task however so I bought (1) 20 ft kit and (1) 10ft kit. I had 30 feet of crack to cover with vertical and horizontal cracks on an old foundation with previous old attempts to repair. Watch the youtube video and read the instructions carefully. The mixed epoxy sets up in like 5 – 10 minutes so mix small amounts. Also the epoxy stinks. One of the jars smelled like sulfur so if you are sensitive you will want to wear a p100 or better mask. I had a window open with a fan blowing out so I had fresh air flowing. The kit does come with safety glasses and 2 pairs of gloves but I wore a more comfortable pair of safety glasses and working with the product I did get splash on them. Also have extra pairs of gloves and mixing trays ready and take the time to make sure your epoxy is spread perfect. I had everything on a covered table ready to go in sequence so I could be efficient. When filling the ports with foam - Pin holes would make the foam come out and it made it more time consuming to make sure I got the crack filled. The foam tube does seem to stop about 3/4 of the way in so it doesn't finish a tube like a caulking tube normally would. I still had enough for my project though. Clean up was easy but the epoxy breaks into sharp shards when removing the ports so have a vacuum ready and wear your safety equipment! --- ## 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.tn/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20](https://www.desertcart.tn/products/23752537-radonseal-complete-diy-foundation-crack-repair-kit-urethane-sealant-20) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-16*