What Is Polyurethane Foam Jacking? Foam jacking, also known as “polyfoam” or “polyjacking,” is a modern version of mudjacking that levels concrete slabs in a less invasive way. High-density polyurethane foam is injected into ⅝” holes that expand to lift and level the sunken concrete. Polyfoam is stronger and longer-lasting than traditional mudjacking. Concrete Leveling...Read More