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Concrete Foundation Crack Repair kits

Repair poured concrete foundation wall cracks from the inside — no digging. Choose polyurethane to stop water leaks, or epoxy to restore structural strength.

Polyurethane Kits — Stop Active Leaks in Basement Walls

  • Best for non-structural, leaking cracks — works even when wet.
  • Hydrophobic PU reacts with water and expands 20× through the wall to seal.
  • Ideal for pipe penetrations and typical basement wall leaks.
  • Crack width range: 1/32" to 3/8". Kits from 10ft to 60ft.

Shop Polyurethane Injection Kits →

Epoxy Kits — Structural Repair for Poured Concrete

  • For cracks that need structural strength — bonds concrete back together.
  • ASTM-C881 compliant. 12,000 PSI bond strength — stronger than surrounding concrete.
  • Viscosity options (LV, MV, HV) for hairline to 3/8" cracks.
  • Add stitches or staples where additional reinforcement is needed.

Shop Epoxy Injection Kits →

Which Kit Is Right for Your Crack?

  • Leaking or wet crack? Use polyurethane — it reacts with moisture and expands to seal.
  • Dry structural crack? Use epoxy — it restores full load-bearing strength.
  • Not sure? Call us at 1-866-445-3984 for quick sizing and product help.

Injection Supplies & Refills — ports, pastes, mixers, and accessories for both systems.

Need help choosing? Compare kits below or call for quick sizing help.

Sub Categories
Polyurethane Crack Injection kits
Low-pressure polyurethane foam injection kits for leaking concrete foundation walls. Seal non-structural cracks from 1/32 to 3/8 inch. Expands 20x on contact with water. Free support
Epoxy Crack Injection kits
Concrete Epoxy Crack Injection Kits for Poured Foundation Walls - D-I-Y and Pro Products for Repairing Cracks in Basements and Vertical Walls.
Category Items
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10ft DIY Universal Polyurethane Foam Crack Injection kit1
Auto-injector polyurethane kit that seals leaking foundation cracks 1/32" to 3/16" wide with no gun and no caulk gun — the ports inject for you. Covers up to 10 ft. Upgradable to 20 ft.
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NX1110
Regular Price: $150.00 USD ($199.95 CAD)
Sale Price: $122.00 USD ($162.63 CAD)
InStock

Polyurethane Crack Injection Kit 10-60ft
10 ft pro polyurethane kit for leaking basement and foundation walls. Seals non-structural cracks 1/32" to 3/8" wide using low-pressure injection. Upgradeable to 60 ft for contractors.
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NX1112
$219.00 USD ($291.93 CAD)
InStock

Pipe Penetration Kit (1-4 Pipes)
Polyurethane seal kit for 1 to 4 pipes or holes penetrating concrete walls. Stops leaks around pipes, conduit, and lines entering the basement. Easy-to-use blended foam.
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NX1114
$99.00 USD ($131.97 CAD)
InStock

High pressure polyurethane concrete crack injection kit
High-pressure DIY kit for small or previously-failed leaking cracks. Drives polyurethane deep at up to 4,500 PSI using 25 mechanical packers — no surface ports. Includes pump and installation tools.
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NX1116
$199.00 USD ($265.27 CAD)
InStock

10 ft DIY ULV Auto Injector Kit 3 for Ultra Small Cracks
For ultra-fine hairline cracks 1/64" and smaller, plus rusted snap-tie holes. 10 ft DIY epoxy kit with ultra-low-viscosity resin and auto-injectors. Everything needed for the finest crack repair.
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NX1310
Regular Price: $189.00 USD ($251.94 CAD)
Sale Price: $169.00 USD ($225.28 CAD)
InStock

Close-up of Nextstar 10ft epoxy crack repair kit components
10 ft pro epoxy kit for structural foundation wall cracks 1/32" to 3/8" wide. Low-viscosity resin cures to 32°F, restores concrete to original strength. Upgradeable to 60 ft contractor kit.
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NX1312
$218.00 USD ($290.59 CAD)
InStock

Carbon Fiber Stitch Staple and Epoxy 8-15 ft Ultimate Repair Kit
Combined epoxy injection and carbon fiber stitch kit for structural crack repair up to 15 ft. Seals and reinforces in one kit — restores strength and prevents re-cracking.
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NX1314
$399.00 USD ($531.87 CAD)
InStock

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