RaiseRite Concrete Lifting offers two different methods to raise settled concrete. This video illustrates the polyurethane concrete lifting option. As traffic passed over this slab, the vibrations for the settled slab shook the cabinets of the home in the background. Polyurethane was injected under the sunken slab. This polyurethane fills the voids, and expands to raise the concrete. After seconds, the material expands into a foam that will never lose density. This stabilized the roadway slab avoiding future vibrations. Raising settled concrete is the cost-effective solution when compared to replacing good concrete.