Chemicals | Powders | Specialty Repairs


Waterstop™ is a non-corrosive, non-rusting, extremely fast setting hydraulic cement compound for plugging and stopping active water leaks in concrete structures or masonry surfaces. When mixed with water to a thick consistency and hand formed into a plug, it will stop active leaks even under water.

PROP65 WARNING: This product can expose you to chemicals known to the state of California to cause cancer or birth defects or other reproductive harm. For more information go to  (Lithium Carbonate, Silica)

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67375 50 lb. pail Call for price $71.53
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  • Stops active water leaks
  • Extremely fast setting
  • Strong & Durable
  • Interior or exterior use

Waterstop is designed to be used to stop water flow through non-moving cracks, crevices and holes in concrete or masonry surfaces; it stops leaks into or out of basement walls, concrete blocks, tubs, swimming pools, concrete pipe, culverts, manholes, elevator pits, and storm drains. Waterstop™ can be used as a plug for cisterns, sewers, tunnels, mines and dams.