For providing a fast and positive drainage of liquid form within the confining material after the installation of the Rawmat^® HDB range of membranes.

Rawell's Rawdrain products provide a positive drainage layer for the removal of water from within Tank Farm Bunds where the Rawmat^® HDB membrane is providing an impermeable layer below. Rawdrain 12 is also used extensively above the Rawmat^® HDB membrane in both podium decks and vertical walls to effectvely remove water away from the structure. The Rawdrain also provides a layer of protection in between the Rawmat^® HDB membrane and the backfill placed as the confining layer to the system.

The Rawdrain is supplied with different depths of cuspate depending on the flow rates required for the application the system is being employed in. The rolls are also available in different widths and lengths to ease handling and installation.