Polyurethane foam injection
Structural polyurethane foam is injected through dime-sized holes to fill voids, stabilize soil, and lift sunken concrete back to level — usually within 15 minutes of cure time.
How it works
Polyurethane foam injection is the engineering core of polyjacking. We use a closed-cell, high-density two-part polymer foam that expands roughly 20× its liquid volume, generates 4,000–6,000 lbs/ft² of lifting force, and reaches 90% of full strength within 15 minutes. Unlike mudjacking slurry, our foam is hydrophobic — it will not absorb water, wash out, or freeze. It bonds to soil particles, fills micro-voids, and provides long-term sub-base stabilization in addition to the lift itself. The same material is specified by transportation departments across North America for highway slab lifting.
Cost
Foam itself is priced by the pound or by the lift job. Small void-fill and stabilization jobs start around $400. Most residential lifting jobs use $300–$1,200 worth of foam, with total job pricing of $500–$2,500.