NaturaFlow 7000TM Drainage Board is a high performance, 3-dimensional drainage composite with three layers. It consists of a dimpled drainage core and two layers of high strength polypropylene (PP) geotextile. One geotextile (black) is heat-bonded to dimples, the other geotextile (white) is fully adhered to the backside of the drainage core. This provides a smooth surface for the application of liquid applied waterproofing membrane. The drainage core is made from a special high-density polyethylene (HDPE) that provides high-impact and tear-resistance, and is unaffected by environmental stress-cracking. The non-clogging geotextile is fully bonded to the dimpled drainage core, which prevents it from being pushed into the flow channels.