Cemproof Plug

Cemproof Plug is a quick-setting cement based mortar that instantly stops running water from cracks, fissures, holes or other openings in concrete and masonry. It is non-shrink and sets within three to five minutes depending on the temperature. Once Cemproof Plug sets, it should be over coated with Crommelin® Cemproof Flex.

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  • Features & Benefits
  • Areas of Use

Features & Benefits

  • Does not shrink or become weak due to its exothermic reaction.
  • Increases in volume, giving a permanent seal in areas where there is flowing water.
  • Setting time can be controlled by adding warm or cold water. Setting may even be instantaneous by adding hot water during warm weather.
  • Mechanical properties are similar or higher than concrete.
  • Non-toxic, it can be used in contact with drinking water.
  • Sets even underwater.
  • Does not contain chlorides or other corrosive compounds.

Areas of Use

  • Basements & Tunnels
  • Concrete Water Pipes
  • Foundations
  • Water Retaining Structures


Consistent with the 50 year history of Crommelin, our management team is committed to providing all customers with sound technical advice, innovative products and acceptance of responsibilities associated with our specifications and systems. Warranties of up to 15 years are issued following Quality Assurance procedures. They consist of tailored specifications, maintenance schedules and on site support. Please contact Crommelin for further information.

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