Polyurethane foam works for concrete lifting by injecting a liquid resin beneath the sunken slab through small holes drilled in the concrete. Once injected, the two-part resin rapidly expands into a dense, rigid foam. This expanding foam fills any voids under the slab, compacts weak or loose soil, and generates enough upward pressure to gently lift the slab back to its original level. The foam cures in minutes, providing long-lasting stability and support for the concrete. The process is precise, minimally invasive, and allows for immediate use of the repaired area. If you want to know more just visit our website and get a free consultation today.