Fast-setting, portland cement based, water-stop


MORTAR-PLUG is a one-component, fast-setting, portland cement based, water-stop designed to instantly stop active water leaks through holes and cracks in concrete or masonry.

Typical Applications:

    When mixed with water, MORTAR-PLUG can be used to stop leaking water in:
  • Water/waste-water treatment tanks
  • Non-moving (static) cracks and holes with running water
  • Non-moving joints, or form-tie holes
  • Basements
  • Sumps
  • Tunnels


  • Stops water leaks in two to four minutes at 68°F (20°C)
  • Fast return to service
  • Ready to apply cementitious coating in 15 minutes
  • Excellent bond to concrete and masonry
  • Easy application - no odor - no fumes

CSI Divisions:

  • Division 3 - Concrete (03 00 00)
  • Maintenance of Concrete (03 01 00)
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