3M™ fire barrier CS-195+ composite sheet is a one part composite system comprised of four components. The heart of the system is an organic/inorganic, fire-resistive elastomeric sheet. It is bonded on one side-to a layer of 28 ga galvanized steel. The other side is reinforced with hexagonal shaped steel-wire mesh and covered with aluminum foil. CS-195+ composite sheet is designed to seal larger penetrations through fire-rated walls and floors. It is also used for shielding cable trays and conduit, HVAC ductwork and vital process equipment from radiant heat, flame spread and smoke. CS-195+ composite sheet functions as an effective intermittent fire-break within horizontal and vertical cable tray runs and is excellent for both new and retrofit construction.