Concrete stabilization is a proactive repair that strengthens the soil beneath a slab and eliminates hidden voids to prevent future sinking, typically using specialized polyurethane injected without lifting the concrete.
In depth
Where lifting corrects a slab that has already dropped, stabilization is about stopping movement before it becomes visible damage. Injected foam compacts and reinforces weak subgrade, fills gaps that would otherwise let the slab flex, and creates a stable, water-resistant base. This is common under warehouse and machine-shop floors, municipal buildings, and any slab where uniform support and no downtime matter.
Polyurethane is preferred over mudjacking for stabilization because it is lighter, stronger, and engineered for long-term performance, whereas heavy slurry can add load and worsen settlement.
How Acme applies it. Acme stabilized the interior floor of Crystal Lake City Hall with high-density, water-resistant polyurethane meeting Illinois Tollway compressive-strength standards, completed in hours with immediate reuse.
Related terms: Void Filling, Undersealing, Subgrade, Rocking Slab, Deep Foamjection
Frequently asked questions
Is stabilization the same as lifting?
No. Stabilization strengthens the soil and fills voids to prevent movement, often without raising the slab. Lifting raises a slab that has already settled. The two are frequently combined.
Is polyurethane safe for the environment?
Yes. Cured polyurethane is non-toxic and chemically inert, is water-resistant, and will not leach harmful substances into soil.