STL Polyjack is the best-rated Concrete Leveling in St. Louis. We use the Polyjacking method which is using Polyurethane foam for concrete lifting and leveling. The process of lifting the sunken or settled concrete can be done by Mudjacking or by using polyurethane (Polyjacking). The installation process for both methods are similar in that they will lift and level existing concrete on grade but they have some very key differences in terms of sustainability and invasiveness