1.geomembrane is a kind of impervious material for waterproofing. 2.compounded of geotextile,geomembrane. Waterproof geomembraneWaterproof geomembrane is a kind of impervious material compounded of geotextile and geomembrane. It has many types: one textile one membrane, two textiles one membrane, many textiles many membranes and so on. The width general is 4-6m. Waterproof geomembrane is mainly ...