The 3M CS-195+ Fire Barrier Composite Sheet is a highly effective, intumescent firestop material designed to seal larger penetrations against the spread of fire, smoke, and toxic gases. This premium composite sheet expands when exposed to heat, forming a hard char that tightly seals penetrations. It is ideal for blanking out large openings and protecting cable trays, conduits, and piping in commercial and industrial applications. Manufactured in the U.S.A., this durable fire barrier features a specialized composition including hydrated sodium silicate, chloroprene rubber, and endothermic fillers to ensure reliable, code-compliant performance in demanding environments.