Perimeter Damp Proof Course is a bitumen saturated kraft and lightly coated with perlite. Perimeter is designed for use as a separator between timber and metal from concrete, masonry or brick.

A Damp Proof Course (DPC) and concealed flashing is a hi-impact polyethylene film, embossed on both sides.

Black 250um Polythene film, used as a Concrete Underlay and Damp Proof Membrane (DPM).

Super High Strength Concrete Underlay, tear resistant polythene film used as a Damp Proof Membrane