Seepage-proof geomembrane mainly refers to high density polyethylene, which is the HDEP film in the industry. Impervious geotextile is composite geo-membrane which can be divided into one cloth and one membrane and two cloths film one film.
It is generally recognized that as the geotextile is seepage-proof. The main indicator for performance appraisal is permeability?coefficient. The permeability?coefficient of geotextile is higher than that of common plain soil, namely 0.01 to 0.001. Permeable complex made of the compound of geotextile, rubber, asphalt, and plastic has a better seepage-proof performance which is 10 times more effective. Composite of waterproof roll materials such as SBS, polyethylene, PVC, EVA (standard name geomembrane) combines with seepage-proof geomembrane or composite geo-membrane. And composite white geotextile as a protector covers the outside of them. This is impervious geotextile. There is no big difference between them in essence.
