Waterstops in joints in concrete structures perform important functions in protecting the structure, its contents and its environment from various aggressive effects of water--corrosion of steel, mildewing or rotting of organic materials, or eroding the surrounding soil. But if for any reason they do not function properly or if they fail, they are usually difficult to repair effectively. Now an injection method that uses a specially formulated grout with a proven effectiveness makes repair fast and easy.


This grout is a liquid resin of relatively low viscosity at ambient conditions. After it is injected into a joint containing water, the resin reacts with the water, begins to foam and expands in place. A tight, impermeable, elastomeric seal forms, which immediately and effectively cuts off the flow of water through or around a leaking waterstop.