... strength,elongation at break is very large,wide application HDPE Impermeable membrane’s chemical stable performance well, with good acid ... , tunnels, canals, reservoirs, dams, sewage pond, swimming pool, pond ecology, landscape lake, pond aquaculture, and railway and highway projects impervious, ... Low temperature brittlenessproperitiespasspass 1) Black geomembrane requirements HDPE impermeable membrane