... proof effects, complete width and thickness specification HDPE geomembraneProduct survey1,Tianhai flat surface HDPE earthwork film is produced from high-grade polyethylene ... , anti-seepage of plantation roof and roof garden, lining of sewage pipe, etc.).4. Landscape garden (man-made lake, river way, cistern ... halogenation tank, salt film, plastic tarpaulin cover of salt tank). HDPE geomembrane sheet