Poly Leveling vs Mudjacking
The Better Fix: Polyurethane Leveling
If you’re researching ways to fix sinking concrete, you will likely come across two common repair methods: polyurethane concrete leveling and mudjacking.
Both methods are designed to lift and stabilize concrete that has settled due to soil movement or voids beneath the slab. However, the materials and long-term results can be very different.
Saint Louis Polyjack specializes in polyurethane concrete leveling, also called poly leveling and polyjacking, a modern repair method that lifts concrete using expanding foam. While mudjacking has been used for decades, many property owners today choose polyurethane lifting because it is cleaner, lighter, and more precise.
Understanding how these methods work can help you decide which solution is best for your property.
What Is Mudjacking?
Mudjacking is a traditional concrete leveling method that has been used for many years. The process involves pumping a slurry mixture beneath the concrete slab to raise it back into position.
The mixture typically contains materials such as:
- Sand
- Cement
- Soil or clay
- Water
During the repair, technicians drill holes into the slab and pump the heavy slurry underneath until the concrete lifts.
Mudjacking can work in some situations, but the material used is very heavy, which can place additional stress on the soil beneath the slab.
What Is Polyurethane Concrete Leveling?
Polyurethane leveling, also called polyjacking or foam concrete lifting, uses a specialized expanding foam instead of a slurry mixture.
Small holes are drilled into the slab, and a polyurethane material is injected beneath the concrete. Once injected, the material expands and it:
- Fills voids under the concrete
- Stabilizes weak soil
- Lifts the slab back into position
The foam cures quickly and forms a strong, lightweight support beneath the concrete.
This method has become a preferred repair option for many homeowners and commercial properties because it provides clean and precise lifting with minimal disruption.
Key Differences Between Poly Leveling and Mudjacking
While both methods can lift concrete, several important differences set them apart.
Weight of the Material
Mudjacking uses a heavy cement slurry. This additional weight can sometimes contribute to future settling if the soil beneath the slab is weak.
Polyurethane foam is extremely lightweight while still providing strong support. This allows it to stabilize the slab without placing extra pressure on the soil below.
Precision of the Lift
Polyurethane foam expands in a controlled way, allowing technicians to make small adjustments while lifting the slab.
This precision makes polyurethane leveling especially useful for areas where accurate leveling is important, such as:
- Pool decks
- Walkways
- Garage floors
- Interior slabs
Speed of the
Repair
Mudjacking repairs can take longer to cure because the slurry mixture must settle and harden before the slab can handle weight.
Polyurethane foam cures quickly. In many cases, the repaired concrete can be used right after the project is completed.
Size of Drill
Holes
Mudjacking typically requires larger holes to pump the slurry beneath the slab.
Polyurethane leveling uses much smaller drill holes, which helps keep the repair cleaner and less noticeable after patching.
Water Resistance
Mudjacking slurry can absorb moisture over time, which may lead to erosion or loss of support beneath the slab.
Polyurethane foam is water-resistant, helping it maintain support even in areas exposed to moisture.
Why Property Owners Choose Poly Leveling
Because of the advantages listed above, polyurethane leveling has become a preferred method for many concrete lifting projects.
Property owners often choose poly leveling because it offers:
- Smaller drill holes and a cleaner repair
- Lightweight material that reduces stress on soil
- Precise lifting control
- Fast cure time
- Long-lasting support beneath the slab
These benefits make polyurethane leveling suitable for a wide range of residential, commercial, and municipal concrete repairs.
Where Poly Leveling Is Commonly Used
Polyurethane leveling can repair many types of concrete surfaces, including:
- Driveways
- Sidewalks and walkways
- Patios and porches
- Pool decks
- Garage floors
- Interior concrete slabs
- Warehouse floors
- Parking lots
- Commercial building entrances
If the concrete slab is structurally sound but has settled due to soil movement, lifting is often a practical alternative to replacement.
Avoid the Cost of Concrete Replacement
One of the biggest advantages of concrete leveling is that it restores the existing slab instead of replacing it.
Concrete replacement can involve:
- Demolition
- Hauling away debris
- New concrete pouring
- Waiting for the slab to cure
Polyurethane lifting repairs the problem from below, helping property owners save up to 50% compared to replacement.
Get Your Free Concrete Leveling Estimate
314-488-2993
Request Your Free Quote
About Saint Louis Polyjack
Saint Louis Polyjack specializes in polyurethane concrete leveling, lifting, and structural repair throughout St. Louis, MO and surrounding communities. We raise and stabilize sinking driveways, sidewalks, patios, pool decks, warehouse floors, and more using advanced poly foam technology.
Our process is fast, clean, and long-lasting — backed by a 5-year warranty.
Office Location : 12951 Gravois Rd. Ste. 100 St. Louis, MO 63127
Uneven Concrete? Don’t Replace It — Lift It.
Get a Free Estimate Today.
✉️ stlpolyjack@stlpolyjack.com
Serving St. Charles, St. Louis, Sunset Hills, Fenton, Kirkwood, Webster Groves, Ballwin, Chesterfield, Crestwood & Arnold.
Fast responses. No pressure. Free estimates. Financing available.
© Copyright 2026 Saint Louis Polyjack | Privacy Policy | Developed By LevelRightMarketing
