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*The Angi rating for Concrete Mudjacking companies in Ontonagon, MI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Concrete Mudjacking needs.

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Last update on February 05, 2026

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Concrete Mudjacking questions, answered by experts

A slurry of cement, sand, and water is injected beneath the concrete to lift and stabilize it.

Mudjacking typically takes 24 to 72 hours (one to three days) to dry and cure completely before you can resume normal use. The exact time can vary depending on the size of the project. Because the slurry mixture contains cement, it must fully harden to ensure that added weight from walking, furniture, or vehicles won't shift the concrete slab. A professional contractor can advise you on when the surface is safe to use. For comparison, if you use polyjacking instead, the polyurethane foam can dry in just a few minutes, but it's best to wait about an hour before use.

The method involves lifting settled concrete using pressurized cement slurry via drilled holes. This solves uneven surfaces and prevents further settling.

Polyjacking can be a permanent solution to sunken concrete if you also address the underlying issue—like poor drainage—at the same time. The polyurethane material itself can last as long as or even outlast the concrete you’re lifting it with. Your sunken concrete issue will likely return if you don’t couple polyjacking with proper drainage to prevent future soil movement and sinking.

Pros often use mudjacking or polyurethane foam injection to level a sunken concrete patio. Both methods lift the slab by filling voids beneath it. After properly compacting the soil beneath it to prevent future settling, the concrete may need to be removed and re-poured for severe sinking.

The Ontonagon, MI homeowners’ guide to concrete mudjacking services

From average costs to expert advice, get all the answers you need to get your job done.

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