Washington D.C. Metro System

Xypex products were specified by Bechtel Corp and the Washington Metropolitan Transit Authority for use at various locations of the metro area subway system, including sections in central Washington D.C., Bethesda (Maryland), Chevy Chase (Maryland) and Alexandria (Virginia). Areas of application included tunnel sections, large shotcrete vaults, passageways, mechanical rooms, equipment vaults, elevator shafts and various areas in metro stations. The Xypex system was not only used to treat large surface areas but was also used extensively for the repair of severe leakage problems caused by concrete defects and exposure to strong hydrostatic pressures.