Complete foundation crack repair kits for easy, do-it-yourself application. All you need is a standard caulking gun. Permanently seal basement wall cracks while saving money. Effectively stop water leaks, vapor intrusion, and radon gas with a trusted foundation repair solution!
- No Drilling Required  – The low-pressure injection method eliminates the need for drilling.
- Hairline Cracks – Low-viscosity, 2-component, injection urethane is suitable for the repair of hairline cracks.
- No Excavation Necessary – Save serious money by repairing the crack from the inside.
- No Special Tools Required – Use a standard caulking gun to inject.
- Permanent – Prevents water seepage permanently! Imperious to water vapor, soil gases, and even radon.
The #1 Foundation Crack Repair Kit – Trusted Since 1997
Easily repair poured concrete foundation wall cracks with RadonSeal’s DIY Crack Injection Kits, trusted by both homeowners and professionals. Ideal for sealing settling cracks, seams, corner cracks, diagonal cracks, and cracks around egress windows, ensuring a durable and long-lasting repair.
✅  Seals Hairline to Wide Cracks – Effectively repairs cracks up to 1/2″ wide and 10 feet long in poured concrete walls.
✅  Expanding Polyurethane Foam – Expands up to 35X to fully seal the crack’s depth and length permanently.
✅  Works on Wet or Damp Cracks – No need to wait for the crack to dry—polyurethane foam adheres even to moist surfaces.
🔹 For Structural Repairs: Use our Epoxy Crack Injection Kit for added strength.
🔹 For a Clean Finish: Choose the Easy-Peel Injection Kit with a removable surface sealer for a neat, professional look.
Limitations: Not intended for use on horizontal cracks, floor cracks, or cracks in concrete block walls. Not recommended for applications requiring structural reinforcement.
