Concrete lifting foam is a two-part, high-density polyurethane polymer with a closed-cell structure. It's injected as a liquid through small holes drilled in the concrete slab. Once injected, the foam expands quickly—up to 7 feet—filling voids beneath the slab while compacting the underlying soil. This process creates a stable, solid base and lifts the concrete back to its proper level.

In most situations, yes. Foam lifting requires much smaller injection holes—approximately 5/8 inch compared to 2 inches for mudjacking—and the material is significantly lighter, which reduces stress on weakened soil. Additionally, foam cures faster and is naturally water-resistant, so it won't erode or wash away when exposed to moisture.

The foam sets very quickly, usually within 15 minutes after injection. This allows foot traffic and vehicle use to resume almost immediately following the repair.

Yes, it can. Polyurethane foam is water-resistant and can be injected even in wet conditions. Cold weather installations are also possible, though they require specialized equipment that maintains proper temperature control for the two-part mixture to expand as intended.

When underlying soil issues are properly addressed, foam-lifted slabs can last 20 years or more. The foam itself is waterproof and doesn't degrade, shrink, or break down over time, making the repair nearly permanent.

Foam lifting generally costs 50–70% less than full slab replacement. Although the material itself is more expensive than mudjacking, the overall project is faster, less invasive, and more cost-effective.

Epoxy is used when you need to restore structural integrity to cracked concrete, such as in walls or floors. While foam is designed to lift slabs and fill voids beneath them, high-strength epoxy is injected directly into cracks to bond them together, essentially welding the concrete back into one solid piece.

Injection ports are installed and sealed along the length of the crack. A two-part epoxy is then injected under pressure, filling the crack throughout its entire depth. This creates a strong, durable, and waterproof structural bond.

Epoxy generally sets within 4–6 hours and reaches full cure in about 24 hours.

Epoxy resin is used for structural strengthening of tight, narrow cracks. Polyurethane foam, on the other hand, is used to seal leaking cracks or fill larger voids within cracks, as it expands to fill available space—something epoxy does not do.