Homeowners Greg and Dottie contacted MidAmerica Basement Systems to learn more about the concrete repair services that we offer. The polyurethane foam is injected under the concrete slab. The foam fills the void and expands and hardens under the concrete and lifts and levels. After lifting and leveling the slabs they had Nexus Pro to fill out all of the cracks. The Nexus Pro will help when the slabs grow and shrink with the seasons in the heat.