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Stopping Water Leaks


Polyurethane for Stopping Leaks in Concrete

Spetec PUR H100 is a one-component, closed-cell, hydrophobic, water-reactive, solvent, and phthalate-free, low viscosity resin. It’s widely specified by engineers to stop leaks in concrete, especially large gushing leaks. For other ways to fix water leaks, see the page on Leak Seal.

Available Sizes



  • Water cut-off of large flow and high pressure water leaks.
  • Water cut-off of water leaks in foundations such as diaphragm walls, piling sheets and secant piles.
  • Stabilization and water cut-off of large cracks, voids and gravel layers.
  • Pre and post injections in mines, tunnels, pipe jacking, drill & blast and TBM applications.
  • Injections in combination with cement-based grout.
  • Crack and gravel layer injections in concrete structures.
  • Soil stabilization and anchors in porous geology.
  • Water cut-off of sewer water leaks and sewer stabilization.
  • Probe grouting for below grade pipes.
  • Manhole injections.


  • Available in 10.5 oz Hot Shot Cartridges.
  • One component.
  • Different reaction times are possible by adjusting the percentage of GEN ACC Accelerator.
  • The closed-cell structure of cured polyurethane ensures permanent sealing of cracks and joints.
  • Cured polyurethane exhibits high strength and good chemical resistance (contact our Technical Service for chemical resistance).
  • Cured polyurethane is harmless for the environment and resistant to biological attack.
  • Certified To NSF/ANSI/CAN 61 (approved for contact with drinking water).


  • GEN ACC Accelerator
  • AP Pump Flush
  • AP Soak 130


  • Single component airless sprayer recommended.

Download a Leak Seal or Geotech catalog.