3M Fire Barrier Putty Sleeve DT400, 4 in Round, 1 Kit/Case

• Allows for both new and retrofit data and telecom cable firestop installations
• Brackets and sleeve work in tandem to help prevent slipping during installation
• No gasket required to ease installation process
• Ready-to-install kit for complete cable or blank firestop installation
• Rolled-out lip on sleeve allows for smooth cable entry
• Tested up to 4 hours for fire-rated through penetration systems in accordance with ASTM E814 (UL 1479)

3M Fire Barrier Putty Sleeve Kits are designed to help prevent the passage of fire and smoke in new or existing cable penetrations through walls or floors. These kits are tested up to 4 hours for fire-rated through penetration systems (in accordance with ASTM E814). No gasket is required with this product and it allows for both new and retrofit data and telecom cable firestop installations.

Ready to Install and Prepared to Protect
Prevent the passage of fire and smoke with 3M™ Fire Barrier Putty Sleeve Kits. These fire barrier sleeve kits can protect existing cable penetrations through walls or floors and be used as a one-piece sleeve or the sleeve may be split/hinged for existing cable installations. Tested up to 4 hours for fire-rated through penetration systems in accordance with ASTM E814 (UL 1479), these putty sleeve kits are a ready-to-install kit. This product does not require gaskets and its rolled-out lip on sleeve facilitates smooth cable entry. The sleeves can be easily installed in openings that are either tight to the sleeve or irregular and can accommodate oversized openings (up to a one-inch larger diameter than the 3M™ Fire Barrier Putty Sleeve diameter).

Recommended Applications
3M™ Fire Barrier Putty Sleeve Kits are suitable for installation in gypsum wallboard and concrete walls or floors and ideal for applications such as: 

Existing through-penetration openings with cables
Future cable installations 
New construction through-penetration openings for power and communication cables

Versatile Kit for an All-in-One Solution
3M™ Fire Barrier Putty Sleeve Kits are ideal for high traffic cable penetrations and designed to be used for both new construction and retrofitting. The blank sleeve (0% cable fill) accommodates future cable installation while the two-piece split/hinged design offers easy retrofit installation on existing cables. The brackets and sleeve work in tandem to help prevent slipping during installation so the sleeve will remain in place.

Each kit comes complete in a box containing a 3M™ Fire Barrier Putty Sleeve (two-part metallic sleeve with set of two-part metallic flanges), 3M™ Fire Barrier Moldable Putty+, sheet metal screws, drywall screws and two installation identification labels. These kits can be used as a one-piece sleeve or the sleeve may be split/ hinged for existing cable installations. A versatile and economical solution, these putty sleeve kits are able to meet application requirements in such a way that help reduce inventory. 

Innovative Fire Barrier Solution
Whether used in new construction or renovation projects, 3M™ Fire Barrier Putty Sleeve Kits provide everything you need in one complete kit. Our innovative sleeve design delivers both fire and cable protection and helps ensure smooth cable entry and no-slip installations. Rest easy and enjoy the peace of mind that comes from a kit that maintains all the components necessary to meet firestop code for installation of cable and blank applications. 

Trusted 3M Firestop Model

The 3M Fire Barrier Putty Sleeve DT400 offers reliable fire protection designed specifically for cable penetrations. This model ensures safety by preventing fire and smoke passage through walls or floors, making it a trusted choice for firestop installations.

Its design supports both new and retrofit data and telecom cable firestop setups, providing flexibility for various projects. The DT400 model is part of a ready-to-install kit that simplifies the firestop process.

Convenient 4 Inch Size

This fire barrier sleeve comes in a 4 inch round size, ideal for accommodating common cable penetration openings. The rolled-out lip on the sleeve allows smooth cable entry, reducing installation difficulty and protecting cables during setup.

The 4 inch dimension also supports oversized openings up to one inch larger than the sleeve diameter, offering versatility for irregular or tight spaces. This size fits well in gypsum wallboard and concrete walls or floors.

Complete Kit One Case

Each purchase includes one kit per case, providing everything needed for a full installation. The kit contains the two-part metallic sleeve, metallic flanges, moldable putty, screws, and identification labels, ensuring no missing components during setup.

This all-in-one format reduces inventory needs and streamlines project planning. Having one kit per case means you get a ready-to-use solution for both blank and cable-filled firestop applications.

Easy No Gasket Installation

The 3M Fire Barrier Putty Sleeve DT400 requires no gasket, simplifying the installation process. This feature reduces time and effort while maintaining a secure firestop seal around cables.

Brackets and the sleeve work together to prevent slipping during installation, ensuring the sleeve stays firmly in place. This no-gasket design is especially helpful for retrofit projects where ease of use is critical.

Tested Four Hour Protection

This fire barrier sleeve kit is tested up to 4 hours for fire-rated through penetration systems, meeting ASTM E814 (UL 1479) standards. This level of protection provides confidence in fire safety for critical cable penetrations.

Whether for new construction or existing openings, the DT400 kit offers proven fire resistance. Its performance supports power and communication cable installations in both walls and floors.