In Environmental Protection applications the materials act as a barrier to the passage of water, contaminates and vapours in a wide variety of industrial and pollution prevention applications.

Applications for the RAWMAT® HDB membrane include the basal lining and capping off of domestic, industrial and toxic landfill sites.

The chemical resistance of the pre-hydrated bentonite core makes it the ideal material for the repair and re-lining of hydrocarbon containment facilities; whether lining fuel storage bunds or the sealing of domestic transformer bunds. Both the re-lining of existing sewage treatment ponds or the creation of totally new reed beds can be completed successfully using rawmat HDB. In addition the RAWMAT® HDB has been used to line trenches to protect the surrounding ground from leaks from contaminated pipelines and also to protect pipelines when passing through contaminated ground.

The main advantage of the pre-hydrated RAWMAT® HDB is the proven resistance of the bentonite core to The natural sodium bentonite in RAWMAT® HDB membranes and RAWSEAL® waterstops is pre-hydrated with a patented polymer solution which provides a permanent protection to the ionic fingerprint of the clay protecting it from exchange and subsequent breakdown in ground contaminants, a drawback associated with other bentonite systems. As a result the RAWMAT® HDB will perform its function without significant reduction in the k value or permeability of the membrane.

The use of RAWPASTE Mastic ensures extremely simple sealing of pipe penetrations, drainage and monitoring wells and systems without the need for complex and expensive accessories.

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