3M™ Fire Barrier Self-Locking Pillows are self-contained, highly intumescent product designed to firestop a wide variety of through penetrations including cable trays, conduit and blank openings. Interlocking strips hold pillows securely together yet release easily for retrofit or reuse — just remove and reinstall pillows as needed.
- Firestop tested for up to 3 hours in accordance with ASTM E 814 (UL 1479)*
- L-Rating (smoke seal) achievable when used in conjunction with 3M™ Fire Barrier Moldable Putty
- Easy retrofit: remove and reuse pillows as needed
- Interlocking strips lock pillows together
- Graphite-free composition
- Available in three sizes**
- Easy to install, easy to inspect
- No wire mesh required to secure in opening
- Can be cut and retaped with box sealing tape for odd-sized gaps