Low-viscosity structural epoxy injected to the crack’s full depth — bonding your wall back to strength, stronger than the original concrete.
Epoxy crack injection is a structural repair that welds a cracked concrete wall back together. Low-viscosity epoxy is injected through ports to the crack’s full depth, curing into a bond typically stronger than the surrounding concrete. It’s the right method for dry, structural cracks — not for actively leaking ones, which need polyurethane instead.
Pricing reviewed regularly
Structural repairs demand proof. Here’s ours.
Backed by the DryShield family — a quarter-century of GTA basements kept dry.
Injection repairs warrantied for life — and the warranty moves with the house when you sell.
Full commercial coverage on every job, every crew, every home.
Eligible contractor for City of Toronto, Peel & Halton basement-flooding subsidy programs.
Inspection, honest diagnosis, and an exact per-crack quote — free, no pressure.
Your price is confirmed in writing before any work starts — no hourly surprises.
Epoxy is specified when the crack itself compromises the wall and the goal is restoring monolithic strength — not just keeping water out.
• Cracks from settlement an engineer has assessed as stable
• Wider vertical or diagonal cracks (roughly 3 mm+) in poured concrete
• Load-bearing elements — beams, columns, slabs
• Pre-sale repairs where an inspector wants documented structural remediation
• Actively leaking or saturated cracks — epoxy can’t bond to wet concrete; those need polyurethane
• Cracks still moving — rigid epoxy re-cracks beside the repair
• Block, brick or stone foundations — can’t hold pressure injection
• Horizontal cracks with bowing — structural failure pattern; assessment first
| Epoxy injection | Polyurethane injection | |
|---|---|---|
| Purpose | Structural bonding — restores wall strength | Waterproofing — permanently seals leaks |
| Works in wet cracks | No — needs dry/near-dry concrete | Yes — water activates the foam |
| Cured behaviour | Rigid, stronger than base concrete | Flexible, moves with the wall |
| Best for | Stable structural cracks, beams, slabs | Leaking/wet cracks, hairline networks |
| Cure time | Hours to days (temperature-dependent) | Minutes to expand, hours to full cure |
| Typical cost per crack | $850–$1,500 | $750–$1,000 |
The slow way — because full-depth fill is the whole point.
Crack width, pattern, moisture and cause. If we see movement or bowing, we say so before selling anything.
Crack cleaned, ports set every 6–12″, face sealed with paste epoxy.
From the lowest port, epoxy fed slowly until it appears at the port above; repeat to the top.
Surface seal and ports removed after cure; wall dressed paintable.
Warranty certificate and description of materials used.
Cold basements slow epoxy cure — in winter we select cure profiles rated for the wall temperature, not the air temperature, and confirm cure before finishing. Spring is the highest-risk season for choosing epoxy badly: cracks that look dry in August wick moisture in March, which is why our assessment checks seasonal moisture history, not just the crack’s condition on the day.
Quoted separately: engineer’s report where warranted, drywall restoration, multiple cracks.
If epoxy isn’t the right material for your crack, we’ll tell you what is — even when it’s a smaller job than the one you called about. The most common failure we’re hired to redo is epoxy pumped into a wet crack where it never had a chance to bond. Matching the material to the crack is the entire trade, and it’s why the assessment always comes first.
That’s the free part. Written assessment, honest method recommendation, exact quote — and if epoxy isn’t the right material, we’ll tell you what is.
