3M™ Fire Barrier Putty Sleeve Kits

Manufacturer: 3M
Product Description

3M™ Fire Barrier Putty Sleeve Kits are an affordable and re-enterable solution to meet firestop code for the installation of cable and blanks in both new or retrofit applications. Available in DT 100, DT 200 and DT 400.

Each Kit Includes:

  1. 3M™ Fire Barrier Putty Sleeve (two-part metallic sleeve with set of two-part metallic flanges)
  2. 3M™ Fire Barrier Moldable Putty+
  3. Split Metal Sleeve
  4. Split Mounting Brackets
  5. Bag Screws
  6. Wall Labels


  • Up to 4-hour fire ratings per ASTM E 814 (UL 1479)
  • Ready-to-install kit for cable or blank firestop installations
  • Blank sleeve (0% cable fill) accommodates future cable installations
  • Two-piece split/hinged design for easy retrofit installation on existing cables
  • Suitable for installation in gypsum wallboard and concrete walls or floors
  • No gasket required

These kits can be used as a one-piece sleeve or the sleeve may be split/ hinged for existing cable installations. The sleeves can be easily installed in openings that are either tight to the sleeve or irregular. The oversized openings can accommodate up to a one-inch larger diameter than the 3M™ Fire Barrier Putty Sleeve diameter.

    To be used for penetrations through fire-rated construction with blank openings and openings containing various penetrating cable types. These putty sleeve and flange kits provide through-penetration firestop systems. When properly installed, 3M™ Fire Barrier Putty Sleeve Kits help resist the spread of fire, resist the passage of smoke and other gases and helps maintain the original fire-resistance rating of the construction penetrated in fire-rated wall or floor assemblies. 3M™ Fire Barrier Putty Sleeve Kits shall be listed by independent test agencies (e.g. UL, Intertek, FM) and shall be tested to and pass the criteria of ASTM E 814 (UL 1479) Standard Test Method for Fire Tests of Penetration Firestop Systems.

      3M™ Fire Barrier Putty Sleeve Kits are ideal for existing through-penetration openings with cables, future cable installations (blank openings*) or new construction through-penetration openings for power and communication cables. The cable types can be a mixture of the following:

    Cable Fill

    • 100 pr. No. 24 AWG copper conductor telephone cables
    • 1/C-750 kcmil copper conductor power cable
    • 7/C-No. 12 AWG copper conductor control cables
    • Coaxial cables
    • 3/C-No 2/0 AWG aluminum conductor SER cable with No. 1 AWG aluminum ground conductor
    • No. 23 AWG Category 6 data cables
    • Fiber optic cable

      *Blank 4" diameter 3M™ Fire Barrier Putty Sleeve Kit DT 400 requires 3M™ Fire Barrier Packing Material PM4 or 4 pcf mineral wool batt insulation—consult applicable system details.

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