Cracks in poured concrete walls are permanently repaired with an epoxy injection method. We use an epoxy material that is specifically designed for use on concrete surfaces. It has a lower viscosity (thickness) than water, so it can penetrate areas that water can't even get to.

Epoxy injection involves an four step process that not only seals the crack, but also results in a permanent structural repair.

Here's how it works (click on any of the images to see a larger version):

Step 1 - The surface near the crack is prepared: The inside surface of the wall near the crack is cleaned in preparation for a sealer that prevents the epoxy from oozing out through the crack during the injection process.

Step 2 - Injection ports are installed and surface sealer is applied: Based on its overall length, injection ports are installed at various intervals along the path of the crack. The crack and the area around the ports are then sealed.

Step 3 - The crack is injected with epoxy: Starting with the first port at the lower end of the crack, the epoxy is injected into the wall. The resin penetrates the entire thickness of the wall and works its way up to the next port.

Each injection is complete when the epoxy runs freely out of the next higher port. The lower port is then plugged and the process is repeated until the entire crack has been filled.

Step 4 - The last port is plugged and the epoxy is allowed to set up: The epoxy will cure completely within 24 hours. Afterwards, the injection ports and surface sealer can be removed if desired.