3M Fire Barrier Self-Locking Pillows FB369SL, 3 in x 6 in x 9 in, Lock Together for Tight Seal Against Flame, Smoke and Toxic Gas, Easy to Install, Large, Pack of 20

3M Fire Barrier Self-Locking Pillows are self-contained firestops ideal for medium to large through penetrations. Pillows feature Interlocking strips – installers can easily lock multiple pillows together to achieve precise fill and compression with no additional support required. Intumescent fire-rated pillows are designed to expand during a fire, locking themselves around vital components.

• SELF-CONTAINED FIRESTOPS: Designed to expand during a fire, locking themselves around vital components
• EASY TO INSTALL: Remove and reconfigure to help save time and labor. No wire mesh or additional support required
• ASTM E 814 (UL 1479): Up to 3-hour fire ratings
• DEAL FOR: Medium to large openings containing power or communication cables and conduits
• APPLICATIONS: Conduit bank, inner duct cable and cable racks or tray applications, gypsum wall, concrete or block wall and concrete floors, blank openings up to 540 sq. ft, and 1 or 2 cable racks or trays per penetration