Firestopping in Nearly Any Size and ShapeFor larger openings and penetrations where putties and strips alone arent enough, 3M Fire Barrier Composite Sheet CS-195+ is a one-part firestop system that installers can cut and form to exact sizes no mixing or damming required. These sheets are easily installed using common tools and fasteners. Ideal for firestopping penetrations such as cable trays and conduit, the sheets feature intumescent material bonded to 28-gauge galvanized steel, reinforced on its facing side with hexagonal wire mesh and covered in aluminum foil. This combination of organic/inorganic materials makes these composite sheets a reliable firestop in tested and listed systems, new and retrofit. These materials also make an excellent thermal conductor, helping to dispel built-up radiant heat to preserve process and control equipment and help minimize cable derating concerns.Recommended Applications Seal penetrations through fire-rated walls and floors Firestop penetrations including cable trays, cable, piping and large blanks Multiple component installations where heat build-up and derating are concerns Shield conduit, HVAC ductwork, panels, valves and vital heat-sensitive process equipment Fire-resistive and smoke seal for any shape opening in concrete block or slabs Protect cable drop-outs, junction boxes and cabinets Intermittent firestop in horizontal and vertical cable tray runs In conjunction with 3M Fire Barrier Sealant or Moldable Putty MP+Fully Tested and Approved3M Fire Barrier Composite Sheet CS-195+ is firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479).The Science of Better Fire Protection from 3MSince 1925 when a 3M lab assistant invented masking tape, 3M has been applying science to life developing adhesive products and technologies that help entire industries and individual businesses worldwide. The work that began with a single 3M engineer now spans decades and generations. And all of it goes into each adhesive, sealant, protective coating, device and firestop product including 3M Fire Barrier Composite Sheet CS-195+ to improve performance, and to help businesses like yours operate faster, better and more efficiently.