Product Description
3M™ Expantrol™ Flexible Intumescent Strip E‑FIS is an adhesive-backed, black intumescent tape (1/16″ × 1/2″ × 50 ft roll) engineered to seal gaps around door frames, glazing, and perimeter openings. Under fire exposure, the strip expands into a firm char to block flame, smoke, water vapors, and toxic gases.
Key Benefits
- Fire & Smoke Barrier: Intumescent core expands with heat to seal openings and contain fire and smoke.
- Adhesive-Backed Convenience: Built-in adhesive backing enables quick installation without tools or fasteners.
- Flexible & Cut-to-Fit: Conformable material allows easy customization to fit irregular door and glazing profiles.
- Smoke Seal Performance: Helps block toxic gas leakage through fire-rated openings.
Best For
- Fire-rated door frames
- Glazed window and storefront perimeters
- Frame-to-wall or frame-to-glass gaps
- Fire-rated partitions and corridors
- Retrofit firestop sealing
- Smoke seal enhancement applications
Product Properties
| Property | Specification |
|---|---|
| SKU | B40070033 |
| Dimensions | 1/16″ × 1/2″ × 50 ft roll |
| Color | Black |
| Packaging | 10 rolls per case |
| Core Material | Intumescent strip expanding to hard char |
| Installation | Adhesive-backed—no tools required |
| Application | Door frame/glazing perimeter smoke & fire seal |
| Typical Firetest | ASTM D412 tensile strength tested |
