Polyjacking & Polyurethane Concrete Lifting
The Modern Way to Lift Sunken Concrete in Kansas City
Polyurethane foam injection that raises driveways, sidewalks, patios, and garage floors. Lighter, faster, and longer-lasting than traditional mudjacking.
What Is Polyjacking?
Polyurethane Concrete Lifting, Explained
Polyjacking — also known as polyurethane concrete lifting — raises sunken concrete by injecting high-density expanding foam beneath the slab. The foam fills voids in the soil, lifts the concrete with millimeter precision, and cures into a durable, moisture-resistant support layer.
It’s the modern replacement for traditional mudjacking, particularly in expansive clay soil regions like Kansas City.
Most projects complete in 1–3 hours. Concrete is back in service within 15–30 minutes.
Lightweight
Roughly 1/10th the density of cement slurry. Doesn't overload weak soils.
Fast Cure
Load-bearing in 15–30 minutes. Drive on it the same hour.
Precise
Real-time control during the lift, adjustable to within fractions of an inch.
15–30 Min
Same-hour use after the lift.
1/10th Weight
Far lighter than cement slurry.
5/8" Ports
Small holes, patched flush.
Long-Term
Outlasts cement-based lifting in clay.
Common Polyjacking Applications
Where Polyjacking Works Best
Sunken Driveways
Driveways that have dropped at the apron, garage transition, or middle. Restored to grade without demolition. Typical $1,000–$2,200.
Uneven Sidewalks
Trip hazards from settled panels eliminated with precise lifts. ADA-compliant results. Typical $700–$1,000 per panel.
Garage Floors
Slabs that lean toward the door, often from foundation backfill. Foam lifts cleanly with minimal disruption. Typical $1,200–$2,500.
Patios & Pool Decks
Outdoor slabs that have shifted or stopped draining correctly. Lifted with precision to restore grade.
Why We Use Polyurethane Foam
Lighter Material, Better Precision, Less Downtime
Cement-based mudjacking pumps a heavy slurry under sunken slabs. The slurry adds significant weight to soil that’s often already moving, cures over hours or days, and fights the same moisture conditions it’s trying to stabilize against.
Polyurethane foam is built differently. Lightweight enough to not overload weak soil. Hydrophobic enough to displace water rather than absorb it. Fast-curing enough to lock in lifts before anything else can shift.
Polyjacking vs Mudjacking
The Modern Method, Plainly Compared
Mudjacking uses cement slurry. Polyjacking uses polyurethane foam. The difference shows up in weight, cure time, lift precision, moisture resistance, and long-term stability — and in Kansas City clay, polyurethane wins on every measure.
Many homeowners still search for mudjacking because it’s the term they grew up hearing. Most are better served by polyurethane concrete lifting once they understand the differences.
How Long Does Polyjacking Last?
Long-Term Stability for Sunken Concrete
When properly installed, polyjacking provides long-term stabilization. Polyurethane foam doesn’t shrink, wash out, or degrade in soil — three failure modes common to cement-based lifting.
No ground-contact solution is permanent in moving soils. But polyjacking significantly reduces the likelihood of future settlement compared to traditional methods, particularly in Kansas City’s clay subgrade.
Polyjacking FAQs
The most common questions we get from Kansas City homeowners about polyjacking — answered straight.
- Lightweight material that will not overload weak soils
- Fast cure times, often usable in 15 to 30 minutes
- High lift precision for cleaner leveling results
- Moisture-resistant support for long-term performance
Our Polyjacking Process
What to Expect From a KC MudJack Lift
Free Inspection
An on-site evaluation that measures settlement, identifies the root cause, and confirms whether polyjacking is the right fix. About 20 minutes, no obligation.
Foam Injection
Closed-cell polyurethane injected through 5/8-inch ports under the slab. The foam expands, fills voids, and lifts concrete with millimeter precision.
Real-Time Lift
The slab raises as foam expands — visible in seconds, measured against benchmarks for accuracy. No guesswork, no slurry settling overnight.
Same-Day Use
Concrete is back in service within 15–30 minutes of injection. Walk on it, drive on it, no waiting for cure days.
Free Polyjacking Inspection
If your concrete is sinking, uneven, or creating safety hazards, polyurethane concrete lifting is usually the fastest, most cost-effective fix. About 20 minutes on-site for an inspection.
Learn More About
Polyjacking Resources
Polyurethane foam doesn’t shrink, wash out, or degrade in soil. While no ground-contact solution is permanent, this method consistently outperforms cement-based lifting for long-term stability in Kansas City conditions.
Polyjacking typically costs $700–$3,000+, depending on slab size, settlement depth, and access. Most residential projects fall between $1,000 and $2,200.
In most cases, yes. Polyjacking is faster, less expensive, and far less disruptive than removing and repouring concrete. Replacement only wins when the slab itself has failed structurally.
Most polyjacking projects are ready for use within 15–30 minutes after the lift completes.
No. KC MudJack does not offer traditional mudjacking. We specialize exclusively in polyurethane concrete lifting because it consistently outperforms cement-based methods in Kansas City soil conditions.
Polyjacking quick answer
Polyjacking uses foam instead of cement slurry
Polyjacking uses expanding polyurethane foam to lift and stabilize settled concrete. KC MudJack uses this foam-based method rather than traditional cement slurry mudjacking because it is lighter, cleaner, fast curing, and practical for many Kansas City slab settlement problems.
Key facts
- Foam is injected through small ports.
- The expanding material fills voids and helps raise the slab.
- Many projects can be usable again quickly after the lift.
When it works
- Driveway, sidewalk, garage floor, patio, and walkway settlement.
- Voids beneath slabs where the surface is still usable.
- Projects where replacement may be avoidable.
When it may not fit
- Concrete that is too broken to lift cleanly.
- Slabs moving because of unresolved drainage or washout.
- Situations requiring structural foundation repair first.