... with smooth surface geo-membrane hdpe geo-membrane with smooth surfacegeo-membrane 1.Feature:Good mechanical ... building, planted roof, the roof garden of anti-seepage, sewage pipes lining, etc.). 4) landscape (man-made lake, river, reservoir, golf ... .0 mm,can also be customized according to requirement. 4.HDPE geomembrane national standard: GB/T17643-1998 NO ItemResultGLGHGL-1GL-2GH ...