Repair Leaking Foundation Wall Cracks — Permanently!

Cracks in poured concrete walls don’t just let water in—they allow radon gas, humidity, and musty odors to enter your basement. The uPLUG® Concrete Crack Repair Kit permanently seals those cracks from the inside using professional-grade urethane injection foam. Once injected, the liquid expands up to 20× its volume, filling the crack from front to back and bonding tightly to the concrete.

✅ Key Features & Benefits

• Permanent Repair – Fills leaking basement and foundation wall cracks, seams, seeping wire ties, and damp floor-to-wall joints.

• Chemically Advanced – Expanding urethane foam “chases” the crack, filling hidden voids for reliable, long-lasting repairs.

• Save Money – Repair cracks, gaps, and holes yourself and save thousands compared to professional foundation repair.

• Save Time – Designed for homeowners and DIYers. No drilling, grinding, or chiseling needed.

• Flexible Foam Filler – Won’t crack, crumble, or peel like hydraulic cement or caulk.

• Protect Your Home – Blocks water, musty odors, soil gases, insects, and radon.

• No Excavation Needed – Repairs from the inside—perfect for finished basements.

• Complete Kit – Includes everything you need: injection ports, surface seal, foam cartridge, and clear instructions.

Stop Leaks Inside the Wall — Permanently!

Cracks in poured concrete walls don’t just let water in—they allow radon gas, humidity, and musty odors to enter your basement. The uPLUG® Concrete Crack Repair Kit permanently seals those cracks from the inside using professional-grade urethane injection foam. Once injected, the liquid urethane expands up to 20× its volume, filling the crack from front to back and bonding tightly to the concrete. The cured foam stays flexible, so it won’t shrink or pull away when your foundation moves—unlike rigid epoxies, cements, or caulks that fail over time.

No digging. No drilling. No experience required.

Designed for homeowners and DIYers, uPLUG gives you a professional-quality waterproofing repair without hiring a contractor. Just clean the crack, install the ports, apply the surface seal, and inject the foam. The system does the rest—sealing damp cracks, wire ties, and floor-to-wall joints in less than an hour.

⚙️ How It Works

1. Prep the crack – Clean loose material or paint from the surface.

2. Install injection ports – Place ports every 8-10 inches and cover the crack with the included surface seal.

3. Inject the foam – Insert the mixing tip and inject until the foam appears at the next port. The liquid expands to fill hidden voids behind the wall.

4. Let it cure – In minutes, the foam expands and hardens into a flexible, watertight barrier.

5. Finish – Remove ports and smooth the surface seal if desired. Your wall is permanently sealed from the inside.

📦 What’s Included

Each uPLUG® Crack Repair Kit contains everything you need for a complete repair:

• Expanding urethane injection cartridge(s)

• Injection ports and end caps

• Epoxy surface seal / port adhesive jar set (A+B)

• Cartridge tips

• Nitrile gloves and mixing sticks

• Plastic putty knife

• Free technical support from RadonSeal®

🏠 Where To Use

• Leaking poured concrete basement walls

• Foundation cracks and construction joints

• Seeping wire ties and tie-rod holes

• Damp floor-to-wall joints

• Cold joints and small voids around pipes or conduits

Not intended for block walls or actively leaking cracks (the inside of the crack can be wet, but the surface sealer/port adhesive will not cure if the crack is actively leaking).