Crack Work: Devfoam

Before you inject, you must seal the crack surface. If you inject without a surface seal, the foam will just squirt back out of the face.

Not all backer rods are created equal. When performing Devfoam crack work, you must choose the correct diameter and type: devfoam crack work

To understand "Devfoam crack work," you first need to understand the material. Devfoam typically refers to a single-component, hydrophobic or hydrophilic polyurethane foam. When injected into a crack, it reacts with water (or moisture in the air) to expand dramatically—sometimes up to 20 times its original volume. Before you inject, you must seal the crack surface

There are two main types used in crack work: For most foundation crack work, a low-viscosity, hydrophobic

For most foundation crack work, a low-viscosity, hydrophobic elastomeric foam is the gold standard. It penetrates deep into the crack, fills voids, and remains flexible enough to handle minor thermal or settling movements.