Flexible Polyurethane Sealant Stops Water Before It Wrecks the Slab.
Epp Foundation Repair seals concrete expansion joints and stable cracks across Nebraska, Iowa, Kansas, and Missouri with self-leveling polyurethane, a flexible material that expands and contracts with the slab through freeze-thaw cycles.
Let's take the first step toward a healthy home.
A local specialist will inspect your foundation, walk you through the findings, and send a clear estimate, no cost, no pressure.
Concrete Joint & Crack Sealing: how it works and when it's the right call.
The mechanics rely on three things working together: a clean substrate, a proper backer rod, and a sealant chosen for the climate. The technician starts by chasing the joint or crack with a diamond saw or grinding wheel, opening it to a uniform width so the sealant has consistent thickness. Loose material, dust, and old sealant are removed with a wire brush and compressed air; if the surface is contaminated with oil or de-icing salt residue, a solvent wipe finishes the prep. A closed-cell polyethylene foam backer rod is pressed into the joint to set the sealant depth. The backer rod prevents three-sided adhesion. Sealant that bonds to both walls and the bottom of the joint can't flex properly and can tear. Self-leveling polyurethane sealant is then gunned into the joint, where it flows to a smooth surface without tooling. Cure time, and when the sealant can take foot and vehicle traffic, depends on temperature and humidity. Stable cracks (verified with a crack monitor when activity is uncertain) seal the same way. Active cracks won't. The sealant tears as the crack continues to move, and the underlying cause needs repair first.
How we install concrete joint & crack sealing.
Step 01.Crack Stability Assessment
Before sealing a crack, the technician verifies it's stable. Hairline cracks in cured slabs are usually stable; cracks that have visibly widened in the last year or that show fresh edges are active. When stability is uncertain, a crack monitor read over time can show whether the crack is still moving. Active cracks require structural repair first.
Step 02.Joint or Crack Preparation
The joint is opened to a uniform width with a diamond saw or grinding wheel. Uniform width gives the sealant consistent stress distribution. Loose material, old sealant, dust, and debris are removed with a wire brush and compressed air. On contaminated surfaces, a solvent wipe finishes the prep.
Step 03.Backer Rod Installation
A closed-cell polyethylene foam backer rod is pressed into the joint to set sealant depth. The backer rod blocks bottom-of-joint adhesion. Without it, sealant bonds to all three faces, can't flex, and can tear.
"Half the cracks I see could have been a 150-dollar sealant visit two winters ago. By the time they call us, water has been freezing inside that joint 100 times and the edges have spalled. The fix grew from sealant to replacement because nobody plugged the funnel."
Care and expertise from a team that's been doing this since 1994.
Epp Foundation Repair is locally owned and operated, with crews dedicated exclusively to foundation, basement, and concrete work across the Midwest.
Foundation repair, waterproofing, and concrete leveling are our entire focus, not a sideline.
Three decades of experience with Midwest soils, basements, and weather conditions.
Recognized by the Better Business Bureau for integrity and ethical business practices.
Many of our repairs carry a written Epp warranty. The warranty page lists every covered repair and its terms.
Answers to common questions about Concrete Joint & Crack Sealing.
Don't see your question here? Our team is happy to help. Reach out anytime.
Concrete Leveling warning signs this solution resolves.
Each problem sign below is a symptom this solution is engineered to fix. See how we diagnose it before we recommend this method.
Concrete Cracks Diagnosed and Repaired
Epp Foundation Repair has read concrete cracks across Nebraska, Iowa, Kansas, and Missouri since 1994. Most exterior cracks signal a soil problem, not a concrete problem.
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Cracked Driveway
Epp Foundation Repair has assessed and repaired cracked driveways across Nebraska, Iowa, Kansas, and Missouri since 1994, separating cosmetic shrinkage from structural failure during an on-site inspection.
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Broken Sidewalks
Epp Foundation Repair has rehabilitated cracked, spalled, and section-loss sidewalks across Nebraska, Iowa, Kansas, and Missouri since 1994, lifting what's salvageable and coordinating replacement honestly.
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Pool Deck Settling and Tilting Around the Pool
Epp Foundation Repair has lifted settled pool decks across Nebraska, Iowa, Kansas, and Missouri since 1994, and we tell you honestly when the pool itself, not the deck, is the problem.
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Sinking Driveways Diagnosed and Lifted Back to Grade
Epp Foundation Repair, family owned since 1994, diagnoses and lifts sunken driveways across Nebraska, Iowa, Kansas, and Missouri, and the water source gets addressed first.
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Sinking Garage Floors
Epp Foundation Repair has stabilized sinking garage slabs across Nebraska, Iowa, Kansas, and Missouri since 1994 using polyurethane foam injection.
Learn moreServing Nebraska, Iowa, Kansas & Missouri.
Local crews based in five regional offices, dispatched daily across four states. If your town isn't listed, call us: we likely serve your area.
- Omaha, NE
- Lincoln, NE
- Topeka, KS
- Sioux City, IA
- Bellevue, NE
- St. Joseph, MO
- Council Bluffs, IA
- Grand Island, NE
- Papillion, NE
- Kearney, NE
Take the first step toward a healthy home.
A straightforward path from initial inspection to completed repairs.
Schedule your inspection.
A local specialist visits your home, evaluates the foundation, and answers your questions on site. No cost, no obligation.
Receive an estimate based on your needs.
We provide a clear, Customized Repair Estimate with a scope of work tailored to your home's specific issues. Typically within one business day.
Get your repairs.
Trained crews complete the work on schedule.
Over 1,700 homeowners have shared their experience.
A 4.9-star average across Google, with verified reviews from homeowners throughout Nebraska, Iowa, Kansas, and Missouri.
Two ways to start: book instantly, or request an estimate.
Schedule your inspection in seconds with our Driive booking tool, or share a few details and a local specialist will follow up within one business day.
- A local foundation specialist on site
- A complete walk-through of the findings
- A Customized Repair Estimate within one business day
- No cost, no obligation, no high-pressure sales
Expert guidance on protecting your home.
Practical articles from the Epp team on foundation health, waterproofing, and home preservation.
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Five regional offices across the Midwest.
St. Joseph, MO 64506