Flexible Polyurethane Sealant Stops Water Before It Wrecks The Slab.

Concrete crack sealing runs $50 to $200 per crack section in our region, depending on length, width, and prep required. Expansion joint sealing on driveways and patios bills at $3 to $8 per linear foot. A typical driveway expansion joint renewal. 60 to 100 linear feet. Commonly falls between $250 and $700. Written estimate after on-site inspection reflects your scope.

Epp Foundation Repair backs joint and crack sealing with a 5-year written warranty against sealant failure. Loss of adhesion, cohesive splitting, or premature degradation. The warranty assumes the underlying slab remains stable; if the crack reopens because the slab is actively settling, that's a settlement problem requiring foam lift or structural repair, not a second sealant job. Warranty documentation stays with the home.

Water enters the gap, freezes, and pries the slab apart from the inside. In Lincoln, Omaha, Des Moines, and St. Joseph, that cycle runs 50+ times a winter. A 1/8-inch hairline crack with two winters of unsealed exposure typically becomes a 1/2-inch crack with spalled edges. Past the point where sealing alone fixes it. The longer the gap stays open, the higher the chance the slab needs partial replacement instead of a $150 sealant visit.

Polyurethane stays flexible across the full temperature range our region sees (-20°F to 105°F) and tolerates the 50+ freeze-thaw cycles per winter that NE/IA concrete handles. Epoxy is rigid. It bonds well, but it can't move, so the freeze-thaw cycle splits the bond within two seasons. Silicone is flexible but doesn't take paint and has weaker adhesion to concrete. For exterior horizontal joints in our climate, self-leveling polyurethane is the material that lasts. Epoxy still has a role on structural crack injection where you want the slab to behave monolithically. Epp uses epoxy injection on foundation walls, polyurethane on slab joints.

Visual inspection covers most cases. Cured hairline cracks with weathered, blunt edges are usually stable; cracks with fresh, sharp edges or visible widening over the last year are active. When stability is uncertain, Epp installs a crack monitor. A small plate that measures movement to 1/100th of an inch, and returns in 4 to 6 weeks to re-read. If the crack hasn't moved, it gets sealed. If it has, the underlying cause (settlement, expansive clay, structural movement) gets addressed first.

Yes, and it's the right sequence. Foam injection lifts the slab and stops the settlement; sealing then waterproofs the repaired joints and any stable cracks so water can't restart the cycle. Epp commonly schedules sealing as the final step on slab lift jobs, 7 to 14 days after the lift to confirm elevation has held. The combined work (lift plus seal) carries the longer of the two warranties on each portion of the repair.

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.