HDPE Geomembrane: HDPE thickness is between 0.2mm and 2.0mm, ... thickness from 0.3mm to 2.0mm, width from HDPE GeomembraneHDPE thickness is between 0.2mm and 2.0mm, width ... 2.0mm, width from 4m to 7m. They are used in landfill caps and base liner applications under roads, railways ... dams, canals, ponds, rivers and lakes. They are also used for waterproofing of buildings and other similar structures.