3M Fire Barrier Pass-Through Device Foam Plugs are designed for closing 3M Fire Barrier Pass-Through Devices which are used in wall and floor through-penetrations. They are simple to use and help reduce sound and smoke transmission. During a fire, this product, used in conjunction with a 3M Fire Barrier Pass-Through Device, helps maintain a tight seal against smoke.Enhanced Seal for Fire Prevention Engineered to help stop smoke and sound, our 3M Fire Barrier Pass-Through Device Foam Plugs are replacement foam plugs designed for firestop applications in walls and floors. These are re-enterable and reusable. Installation is easy, saving both time and labor. Recommended Applications • Seal ends of 3M Fire Barrier Pass-Through Devices Reliable and Affordable Fire Protection Effective and easy to install, 3M Fire Barrier Pass-Through Device Foam Plugs are part of our family of fire protection products that offer the broadest, long-lasting solutions for a variety of commercial, industrial and residential applications. As a trusted leader in the fire protection industry, 3M offers a broad line of affordable products designed to meet the most demanding firestop requirements. Find the solution you need from the industry-preferred line of fire protection products.