Raising & Stabilizing Concrete Slabs with Poly Foam Advanced insights into why concrete sinks, and how to correct the problem with HMI polyurethane foam In this white paper you will read about the underlying issues with sunken concrete, why it settles, and how to use the HMI approach to raising concrete to bring settled concrete back to its intended elevation. Chapters include: why concrete settles what can be done to correct concrete settling the concrete raising process joint / slab stabilization concrete raising materials Fill out the form on the right and get the white paper now!