Polyjacking uses a two part expanding polymer foam. The process to raise the concrete by foam injection requires a small hole, approximately 5/8” in diameter, drilled through the slab. The polyurethane is then injected under the slab, which through its expansion stage, may interact with any loose soils, filling in all the voided areas, resulting in raising the sunken concrete. The material for this process is very dense, and only weighs approximately 2 lbs per cubic foot.
Seeks out weak soils, and during expansion, creates a strong, dense, sub-base
The material will take the path of least resistance, and will fill in all voided areas
Will retain its cured shape and form, reducing the possibility of forming new voids or further settlement