Product Name
3M™ Fire Barrier Pass‑Through Device Foam Plugs
Product Description
3M™ Fire Barrier Pass‑Through Device Foam Plugs (SKU B40065434) are moldable foam inserts engineered to seal cable, pipe, and conduit openings within 3M Fire Barrier Pass‑Through Devices. Designed to maintain cold smoke seals and reduce sound transmission, these inserts are re‑enterable, reusable, and require no cure time—ideal for dynamic installations with frequent changes.
Key Benefits
- Instant Cold Smoke Seal: Provides an effective smoke barrier immediately upon installation.
- Re‑Enterable & Reusable: Easily removed and reinstalled when cables or pipes need adjusting.
- No Cure Time Required: Saves time and labor—plug is functional as soon as inserted.
- Acoustic Insulation: Helps reduce airborne noise through penetrations.
Best For
- Cable, conduit & pipe penetrations in rated assemblies
- Pass-through devices requiring flexible seal inserts
- Installations needing quick smoke and sound sealing
- Settings with frequent maintenance or access
- New construction or retrofit projects
- Environments with dynamic cable layouts
Product Properties
| Property | Specification |
|---|---|
| SKU | B40065434 |
| Product Type | Foam Plug Inserts |
| Re‑Entry | Yes—remove & reinstall |
| No Cure Time Needed | Yes—effective upon insertion |
| Sealing Functions | Cold smoke + sound attenuation |
| Compatibility | 3M Fire Barrier Pass‑Through Devices (square or round) |




