Designed for Fire Protection and PreventionOffering up to 3 hours of protection, 3M Fire Barrier Pillows are self-contained, intumescent products designed for use in through-penetration firestops, such as cable trays, conduit and blank openings. During a fire, 3M Fire Barrier Pillows intumesce (expand) and lock themselves into place, surrounding the penetrant(s) to help prevent the spread of smoke, fire and toxic gases. These fire pillows are easy to install and do not require mesh wire. They are ideal for projects requiring re-enterability of a firestop system, simply remove and replace pillows as needed. 3M designed this product with graphite-free composition, which does not conduct electricity. Additionally, these fire protection pillows have excellent aging properties, providing long-lasting durability and performance.Recommended Applications3M Fire Barrier Pillows achieve fire resistance for up to 3 hours and are used for through-penetration firestop applications such as: Cable trays Conduit openings Blank openingsTop-Quality Fire Stop3M Fire Barrier Pillows are a part of our comprehensive line of top-quality fire stop and fire prevention products. 3M has proven to be a leader in fire protection products, which are used around the world to help protect people, equipment and buildings. Using science and innovation, 3M helps limit the devastating effects of fire with products like 3M Fire Barrier Pillows. Enjoy the confidence and security that comes from a product that has exceptional and proven fire protection performance.