GeoCHEM HDPE has excellent UV resistance and does not ntain plasticizers which can migrate to the surface, causing premature aging. Manufactured from virgin polyethylene resins, it is designed to provide a high quality, Okaynomical geomembrane. ntact GeoCHEM, Inc. for a Price Quotation on 20, 30, 40, 60, 80 Mil HDPE black smooth or textured