PolyLevel is injected beneath concrete fixtures through a series of strategically-drilled pea-sized holes. This foam fills the gap between the concrete fixture and the compromised soil. As it dries, PolyLevel expands - pushing slabs and concrete fixtures upward. Afterward, the pea-sized holes are patched and become nearly invisible. Once it cures, PolyLevel will provide permanent support between the concrete slab and the ground.