The years of working under sewage conditions is 60~90 years. The service life period issue of geomembrane. Thickness used in irrigation works is 0, mainly depending on whether the plastic film loose anti-seepage and water-proof function. The years of working under clean water conditions is up to 80~120 years. According to the Soviet National Standard. 2m plus stabilizer polyethylene film. Therefore, the service life period of geomembrane is sufficient to meet the service life period required by dam seepage-proofing
