Integral Waterproofing The project progressed from Stage I to Stage II (constructed between 2013-2016) and new construction companies became involved (Serveng & SA Paulista). As a result of the lessons learned from Stage I and the success of Xypex crystalline waterproofing, the design team incorporated Xypex Admix C-500 NF into the concrete for 4.0 km of elevated aqueducts as well as pump stations, flood gates and hydroelectric plants. This stage of the project utilized on-site concrete batch plants. The utilization of Xypex Admix C-500 NF in the concrete mix facilitated project scheduling and provided the owner with waterproof, durable structures that were maintenance free. Stage II used 80 tonnes of Admix C-500 NF and, when put into service, no leaking was observed in any of the Xypex treated structures.