Void Fill: Concrete settling is not the only issue that our foam can solve. Voids under slabs are often present in areas where wash out or excessive settling can occur. Our material will weigh on average 15-25 times less than a traditional mudjacking. This lightweight material will put less stress on an already failed sub-grade. The process of drilling, port installation, and injecting the material is the same as the raising process. All dual component polyurethane foams create heat when installed. Void fills must be done in a layering method to allow heat to dissipate safely.