Geomembranes İzofen Geomembranes Geomembrane is a geomembrane material made of high-density polyethylene, which provides impermeability in projects such as regular solid waste storage areas, mine waste storage areas, acid pools, tank areas, ponds and irrigation channels. HDPE Geomembrane PVC Geomembrane EPDM Geomembrane T-Grip Geomembrane Discrete Geomembrane Water Retainer Tape