Uneven or sunken concrete is a common problem for homeowners and property managers. Whether it’s your driveway, sidewalk, patio, or garage floor, sinking concrete isn’t just unattractive — it can also be a serious safety hazard. Luckily, there are two primary repair methods used to restore sunken concrete slabs: mudjacking and polyjacking.
Both methods aim to lift and stabilize concrete surfaces, but they differ significantly in materials, technique, and long-term performance. In this blog, we’ll break down what each method involves, their pros and cons, and help you decide which is the better choice for your property.
What Is Mudjacking?
Mudjacking, also known as slabjacking or concrete leveling, is a traditional method used for decades to lift sunken concrete slabs. It involves drilling small holes (typically about 1 to 2 inches in diameter) into the affected concrete. A slurry mixture — made of water, soil, sand, and cement — is then pumped underneath the slab.
As the mixture fills the voids beneath the concrete, it creates pressure that lifts the slab back to its original position. Once the slab is leveled, the holes are sealed, and the surface is ready for use after a short curing time.
Pros of Mudjacking:
- Cost-effective: Generally cheaper than polyjacking, making it ideal for large areas.
- Quick repair: The process can often be completed in a few hours.
- Eco-friendly: The slurry mixture contains natural materials.
- Effective for heavy slabs: Works well for larger or thicker concrete slabs.
Cons of Mudjacking:
- Heavier material: The slurry is dense and can add extra weight, potentially causing further settling over time.
- Larger drill holes: The holes required are more noticeable than those used in polyjacking.
- Longer drying time: It can take 1–2 days before the surface is ready for full use.
- Not water-resistant: The mixture can erode or wash away over time, especially in areas with high moisture.
What Is Polyjacking?
Polyjacking (or polyurethane foam injection) is a modern, high-tech alternative to mudjacking. Instead of using a heavy slurry, this method uses a lightweight expanding polyurethane foam to lift and stabilize the concrete.
Technicians drill much smaller holes — typically about the size of a dime (5/8 inch) — and inject the foam beneath the slab. As the foam expands, it fills the gaps, compacts the soil, and gently raises the concrete to its desired level. The foam hardens within minutes, creating a durable and water-resistant base.
Pros of Polyjacking:
- Lightweight material: The foam weighs only a few pounds per cubic foot, reducing the risk of further settling.
- Smaller holes: Leaves a cleaner, more discreet finish.
- Fast curing time: The concrete surface can be used within 15–30 minutes after repair.
- Water-resistant: The foam doesn’t wash out or erode, making it ideal for wet environments.
- Long-lasting results: Polyurethane foam retains its shape and strength for years.
- Precision lifting: The controlled expansion allows for accurate leveling.
Cons of Polyjacking:
- Higher cost: It’s typically more expensive than mudjacking due to advanced materials and technology.
- Limited DIY potential: Requires specialized equipment and experienced technicians.
Polyjacking vs. Mudjacking: Side-by-Side Comparison
| Feature | Mudjacking | Polyjacking |
|---|---|---|
| Material Used | Cement-based slurry (sand, soil, water, cement) | Expanding polyurethane foam |
| Hole Size | 1–2 inches | 5/8 inch |
| Curing Time | 24–48 hours | 15–30 minutes |
| Weight | Heavy (adds pressure on soil) | Lightweight (prevents future settling) |
| Water Resistance | Can erode or wash away | 100% water-resistant |
| Durability | 5–10 years | 10–20+ years |
| Cost | Lower | Higher |
| Appearance | More visible repair marks | Minimal, clean finish |
Which Method Is Better for Concrete Leveling?
When deciding between mudjacking and polyjacking, the right choice depends on your specific situation — including budget, soil conditions, and long-term goals.
Choose Mudjacking if:
- You’re looking for a budget-friendly solution.
- The concrete area is not exposed to moisture frequently.
- You’re planning to resurface or replace the slab in the near future.
- The slab is large and heavy, and cost efficiency is the priority.
Choose Polyjacking if:
- You want a long-lasting and permanent repair.
- The area is prone to water exposure or poor drainage.
- You need the surface to be ready quickly (such as driveways, garages, or commercial spaces).
- You care about aesthetics and want minimal visible repair marks.
- You’re looking for modern, low-disruption technology backed by professional results.
In most cases, polyjacking is the superior choice for homeowners who value durability, precision, and long-term stability. Although it costs more upfront, its lasting performance and minimal maintenance often make it the more cost-effective option over time.
Why Professional Concrete Leveling Matters
Regardless of which method you choose, concrete leveling should always be handled by experienced professionals. Reputable concrete repair and leveling companies use advanced equipment to evaluate soil conditions, detect voids, and ensure the slab is lifted evenly and safely.
Attempting DIY solutions can lead to uneven lifts, cracks, or even more severe foundation damage. Professional technicians can determine whether mudjacking or polyjacking is best for your situation based on your soil type, location, and project scope.
Frequently Asked Questions (FAQs)
1. Is polyjacking more expensive than mudjacking?
Yes, polyjacking typically costs 30–50% more than mudjacking. However, it offers longer-lasting results, faster cure times, and less visual impact — often making it the better long-term investment.
2. How long does a polyjacking repair last?
Polyurethane foam is highly durable and can last 20 years or more without deterioration or washout.
3. Can mudjacking or polyjacking fix severely cracked concrete?
These methods can lift and level concrete but won’t repair large surface cracks. In such cases, resurfacing or replacement may be necessary after lifting.
4. How soon can I use my driveway after polyjacking?
You can typically use the repaired surface within 30 minutes after the procedure — a major advantage over mudjacking’s 24–48 hour cure time.
5. Does polyjacking work on all types of concrete?
Yes, it’s effective for driveways, sidewalks, pool decks, patios, warehouse floors, and even airport runways.
Final Thoughts
Both mudjacking and polyjacking serve the same purpose — to lift sunken concrete and restore stability. However, their differences in material, technology, and longevity make polyjacking the more advanced and reliable option for most modern applications.
If you’re dealing with uneven concrete around your property, consult a professional concrete leveling expert. They can assess the issue, recommend the right solution, and help you restore your surface safely and efficiently.
