3M™ Fire Barrier Pass-Through Device Foam Plugs

3M™ Fire Barrier Pass-Through Device Foam Plugs are designed for closing 3M™ Fire Barrier Pass-Through Devices which are used in wall and floor through-penetrations. They are simple to use and help reduce sound and smoke transmission. During a fire, this product, used in conjunction with a 3M™ Fire Barrier Pass-Through Device, helps maintain a tight seal against smoke.

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)