What Is the Difference Between Polyurethane Foam and Mudjacking?

Polyurethane foam is lightweight, waterproof, cures in minutes, and goes in through penny-sized holes. Mudjacking uses a heavy cement slurry, needs larger holes, and takes 24 to 48 hours to cure. Foam weighs about 2 to 4 pounds per cubic foot versus 100+ pounds for mudjacking material — so foam is far less likely to overload the soil and cause the slab to settle again.

That weight difference is the whole story. Mudjacking adds heavy material on top of soil that was already too weak to hold the slab up. Foam fills the void, locks in, and barely adds load. It also doesn't wash out, which matters a lot for Twinsburg's freeze-thaw winters and anything near water — driveways, pool decks, downspout runs.

Mudjacking still has its place on some big agricultural or roadway slabs. For residential concrete in Northeast Ohio, foam is almost always the better long-term repair.