Nelson Firestop Pillow AA0478 – UL FM 4-Hour Rated Firestop Seal The Nelson Firestop Pillow AA0478 is a compressible firestop device designed to maintain the integrity of fire-rated walls and floors by effectively sealing openings around penetrants such as cables, cable trays, ducts, and pipes. Each pillow measures 9.6 inches in length, 4 inches in width, and 3 inches in thickness, and is available in boxes containing 18 units. Key Features High Fire Resistance: Certified with a 4-hour fire rating, the AA0478 pillow meets stringent safety standards, providing robust protection against the spread of fire and smoke. Flexible and Re-enterable: The compressible nature of the pillow allows for easy installation and removal, making it ideal for applications where frequent changes or retrofitting are necessary. Durable Construction: Composed of mineral fiber treated with a specially formulated firestop coating, each pillow is encased in a strong polyethylene bag, ensuring durability and longevity. Non-Toxic and Safe: Designed to emit no disagreeable toxic or hazardous fumes, ensuring safety during installation and in the event of a fire. Easy Installation: The pillows can be coated with cable pulling lubricant for smoother installation. They are to be tightly packed and inserted lengthwise into openings, conforming to the specific requirements of the application. Applications The Nelson Firestop Pillow AA0478 is ideally suited for sealing penetrations in fire-rated walls and floors, particularly in scenarios involving cable trays, conduits, and other mechanical or electrical penetrations. Its design accommodates installations where frequent modifications are anticipated, offering a reliable and adaptable firestopping solution. Certifications and Approvals Underwriters Laboratories Inc. (UL) Listed Factory Mutual (FM) Approved These certifications affirm the product’s compliance with rigorous fire safety standards, ensuring dependable performance in critical firestop applications. For optimal results, installations should adhere to the appropriate Nelson application system drawings and guidelines.