Geopolymer injection is one of the most advanced techniques available for lifting and stabilizing sunken concrete. Unlike traditional mudjacking, which pumps a heavy cement slurry under slabs, this modern method uses lightweight polyurethane foam to restore uneven concrete quickly, cleanly, and permanently.
At Slabjack Geotechnical, we specialize in applying this technology to sidewalks, driveways, patios, garage floors, warehouses, roadways, and more. Our goal is simple: provide property owners with a stronger, faster, and longer-lasting solution to concrete settlement.
How the Geopolymer Injection Method Works
The geopolymer injection method combines precision with innovation. Instead of flooding the soil beneath a slab with heavy material, our team uses state-of-the-art equipment to inject high-density foam into targeted areas. Here’s how it works step by step:
- Inspection & Planning – We examine the settled slab, identify voids or weak soils, and determine where injection points should be placed.
- Drilling Small Holes – Unlike mudjacking’s large, messy holes, our process requires only ⅝″ openings—about the size of a dime. These are spaced three to four feet apart for even lifting.
- Precise Injection – Polyurethane foam is pumped through the holes. As it expands, it fills voids, compacts loose soils, and gently raises the concrete back to its intended level.
- Leveling & Stabilization – The foam hardens within minutes, creating a strong, water-resistant base that stabilizes the slab for years to come.
- Finishing Touches – We patch the holes with color-matched materials so repairs are barely noticeable.
The entire process is fast, quiet, and clean. In most cases, slabs are ready for normal use the same day—sometimes within hours.
Benefits of Geopolymer Injection for Concrete Repair
Choosing Slabjack’s geopolymer injection service comes with advantages that traditional mudjacking simply can’t offer:
- Minimal Disruption – No jackhammers, no slurry mess, no garden hoses required. Our crews complete most projects without disturbing landscaping, indoor operations, or business traffic.
- Fast Curing Time – Polyurethane foam hardens in minutes. That means driveways, sidewalks, and even warehouse floors are back in service almost immediately.
- Lightweight Strength – While mud slurry weighs up to 140 lbs per cubic foot, our foam weighs just four lbs per cubic foot. It strengthens weak soils without overburdening them.
- Hydrophobic Durability – Our proprietary RR401G polymer is fully hydrophobic—meaning it can’t wash out. It even cures in saturated soils, something mudjacking can’t accomplish.
- Eco-Friendly Solution – Instead of replacing slabs and sending tons of concrete to landfills, we restore what’s already there. The polymers we use are safe for the environment and last for decades.
- Clean Finish – Because drill holes are small and carefully patched, the slab looks intact instead of pockmarked with large, obvious patches.
The result is a repair method that’s efficient, durable, and unobtrusive—perfect for homeowners, businesses, and municipalities alike.
Geopolymer Injection vs. Mudjacking: Key Differences
| Factor | Geopolymer Injection | Mudjacking |
| Drill Hole Size & Appearance | Dime-sized, ⅝″ holes,
patched to blend with the slab |
1″–2″ holes spaced closely together, often leaving slabs looking like Swiss cheese |
| Material Weight & Soil Stress | Lightweight foam (≈4 lbs per cubic foot) | Heavy cement slurry (100–140 lbs per cubic foot), which can worsen settlement |
| Water Resistance & Longevity | Hydrophobic polymer resists water,
rodents, and erosion |
Vulnerable to washout, freeze-thaw cycles, and future settling |
| Cleanliness & Indoor Use | Sanitary, dust-free, safe for warehouses,
offices, and homes |
Messy slurry requires hosing off slabs, impractical for indoor use |
| Cost Effectiveness Over Time | Higher upfront investment
but permanent results |
Cheaper initially but more likely to need repeat repairs |
Applications of Geopolymer Injection
Slabjack’s technology can be applied in almost any environment where concrete has settled.
Residential Properties
Uneven sidewalks, sinking driveways, garage floors, and cracked patios don’t just look bad—they’re safety hazards. Our process restores them quickly without tearing up your yard or disrupting your daily routine.
Commercial Slabs
Businesses can’t afford downtime. That’s why our geopolymer injection method is perfect for warehouses, factories, parking lots, and office walkways. Most jobs are completed in hours, not days, minimizing lost productivity.
Municipal Projects
From city sidewalks to road slabs, we help municipalities maintain public safety and ADA compliance. Our hydrophobic foam also makes us the go-to choice for seawalls and saturated soils where traditional methods fail.
Specialty Applications
Because our RR401G polymer is twice as dense as many foams, it can lift structures and stabilize soils where others can’t. From seawalls to heavy-load slabs, Slabjack has the expertise and equipment to handle unique challenges.
Why Choose Slabjack Geotechnical?
When you choose Slabjack, you’re not hiring just another contractor—you’re partnering with the Northwest’s leading authority on advanced concrete leveling.
- Proven Experience – Thousands of successful projects completed since 2011.
- Specialized Materials – Proprietary RR401G polymer offers unmatched density and performance.
- Family-Owned Values – Integrity, professionalism, and accountability guide every job.
- Top Ratings – A+ with the Better Business Bureau and hundreds of five-star online reviews.
- Full Licensing & Insurance – Complete peace of mind for residential, commercial, and municipal clients.
With Slabjack, you can trust that your concrete repair will be done right—the first time.
The Future of Concrete Leveling
Concrete has been around for centuries, but the way we repair it has changed. The geopolymer injection method is the future of slab stabilization: lightweight, clean, fast, and eco-friendly. Unlike mudjacking, it doesn’t create new problems or leave unsightly holes behind. Instead, it delivers lasting stability in any environment—including those where water, soil, or heavy loads challenge traditional methods.
For homeowners, businesses, and municipalities across Washington and Northern Idaho, this means safer walkways, stronger driveways, and reliable infrastructure—all without replacement.
Get a Free Estimate Today
If your concrete is uneven, sinking, or cracked, Slabjack Geotechnical makes it easy to get help fast. We’ll inspect your slabs, explain whether the geopolymer injection method is the right solution, and provide a clear, no-obligation quote.
With our trusted expertise and family-owned service, restoring your concrete is simple, clean, and stress-free. Contact us today and let Slabjack raise it right the first time.
Frequently Asked Questions
How long does geopolymer injection take?
Most projects are completed in just a few hours. Once the foam sets—usually within minutes—the area can be used again immediately.
Is it safe for indoor projects?
Yes. Because there’s no slurry mess, dust, or water runoff, the process is ideal for warehouses, garages, and offices.
How long will the repair last?
Polyurethane foam is designed to be permanent. It resists moisture, chemicals, and soil erosion, giving you decades of stability.
Can it work in wet or saturated soils?
Absolutely. Our hydrophobic RR401G polymer cures even in fully saturated conditions, making it the only reliable option for seawalls, lakeside slabs, or water-affected soils.
How does the cost compare to mudjacking?
While geopolymer injection may cost more upfront, it’s more cost-effective in the long run. Because it’s permanent, you avoid the repeat repairs and future expenses common with mudjacking.
