Concrete Crack Repair Methods

Leaking cracks or wire ties in foundation walls? Cracks in a slab or concrete driveway? Leaky floor-to-wall joints? Spalling or pitting outdoor concrete?

Here is the widest selection of the most advanced concrete repair products for cracks, joints, and spalling in indoor or outdoor concrete. Designed for permanent repair. Top-quality repairs for contractors but ease of use for homeowners.
(Not sold in stores, shipped factory-direct by courier.)

When to use Crack Injection?

Crack injection is designed for cracks in poured concrete walls. It does not work on concrete block walls because of their hollow cores. It is usually applied from the inside, which avoids digging on the outside of the walls.

It is suitable for hairline cracks, as well as wide cracks (up to ½”).

Crack injection works by filling the entire length and depth of the crack. It permanently stops water leaks and also, prevents water from getting into the concrete and deteriorating it further. No drilling is needed.

Our standard injection kits use polyurethane, which forcefully expands to fill the entire crack and even a void on the outside. If structural strength is definitely required, use our epoxy crack injection kits, which is more exacting. Epoxy does not expand and tends to run out of the back of the crack. A ¼” wide crack will need twice as much epoxy as a 1/8” crack.

Choose from D-I-Y Foundation Crack Repair Kits for homeowners and Professional Foundation Crack Repair Toolkits for contractors.

Applications for CrackWeld Concrete Floor Repair

Fills the full depth of hairline and wider cracks in indoor or outdoor slabs with a fast-curing resin and silica sand. Stronger and harder than concrete. Not flexible.

Quick and easy - no routing of cracks is needed.

Use RadonSeal CrackWeld Concrete Floor Repair Kits for cracks in concrete floors, factory floors, garage floors, driveways, and more. Driveways are ready for overlays in half an hour.

When to Use the Epoxy Crack Filler?

Epoxy's strength and its bond to concrete are stronger than the concrete itself. Unlike injection, Epoxy Crack Filler does not necessarily fill the full depth of the crack but provides a strong surface for heavy traffic. Narrow cracks have to be routed out first with a grinder before pouring in the Epoxy Filler.

What makes Epoxy Crack Filler for Concrete or Masonry really special is that it uses flexible epoxy, in order to allow for the continuous movement of concrete. Using standard epoxy, which has no "give," might cause new cracks to develop next to the repaired one. Common uses:

• Whenever flexibility is needed – expansion control joints in slabs, floor-to-wall joints in basements.
• To form a hard surface for heavy traffic - cracks and expansion control joints in factory or warehouse floors or garages.
• Wide cracks in concrete slabs, fill partially first with sand.
• Cracks in concrete block walls: – mix with sand for troweling on the walls.
• Spalls or holes in concrete – mix with sand and fill the spalls for a permanent repair. Forms a stronger bond than patching.

Pipe Perforation Mender

Permanently repair or prevent the basement leaks around pipe penetrations and through form wire ties. The Pipe Perforation Mender Kit fills the entire void with expandable polyurethane foam. Similar to the Crack Injection Kits.

How NOT to Repair Foundation Cracks

The typical homeowner will try to fix concrete cracks with caulk. But this is only a superficial repair. Water will fill the inside of the crack and cause efflorescence, which will eventually loosen the caulk. In a couple of years, the caulk will start peeling.

Disappointed, the homeowner will pull off the caulk, chisel out the crack, and fill it with hydraulic cement. But hydraulic cement does not bond well to concrete – it needs an inverted V-groove to hold it in. And it is very rigid. As the concrete continuously moves, shrinks and expands, the rigid "rod" will get loose. Efflorescence ("white powder") will start coming through around it, soon followed by drops of water. After a couple years, water will start seeping around it.

An alternative repair method would be to excavate and patch the foundation crack on the exterior. But this would cost thousands of dollars and may not be permanent either because all surface repairs will eventually get loose or crack.

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MADE IN USA
Products not sold through retail stores. Available exclusively from:
Radon Mitigation & Concrete Waterproofing Co.
Novion Inc., 18 L'Hermitage Drive, Shelton, CT 06484 USA
RadonSeal™ is a registered trademark. Copyright © 1998-2009. All rights reserved.

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