3M Fire Barrier Putty Sleeve Kit DT 400 – Firestop Sleeve for Cable and Blank Applications

The 3M Fire Barrier Putty Sleeve Kit DT 400 is designed for passive fire protection in electrical and construction applications, providing a firestop solution for cable and blank openings in concrete floors, walls, concrete block walls, and gypsum wall board. This kit is ideal for electrical distributors, lighting solutions providers, wire and cable installers, and switchgear suppliers needing reliable fire and cable penetration protection. The galvanized steel sleeve and mounting brackets ensure secure installation while the included fire barrier moldable putty holds cables in place, preventing slippage and maintaining fire resistance.

Specifications

• Manufacturer: 3M
• Manufacturer Part #: DT400
• Sleeve Diameter: 102 millimeters (4 inches)
• Sleeve Length: 12 inches (304 mm)
• Bracket Size: 8 inches x 8 inches (204 mm x 204 mm)
• Color: Silver
• Product Weight: 5.9 lbs
• UPC: 051115188060
• Fire Rating: Up to 4 hours per ASTM E814 (UL1479)
• Application Opening Size: Minimum 4-1/2 inches (114 mm), Maximum 6 inches (152 mm)

Features

• Complete kit includes galvanized steel sleeve, mounting brackets, screws, identification labels, and 3M Fire Barrier Moldable Putty+.
• Innovative sleeve design with rolled-out lip for smooth cable entry and no-slip installation.
• Bracket plates cover smooth, rough, or irregular shaped openings to fit various installation needs.
• Easy-slit label allows quick retrofitting around existing cables without sleeve removal.
• Red putty holds cables in position, preventing movement and maintaining firestop integrity.
• Versatile for new construction or renovation projects.
• UL tested and fire rated for up to 4 hours.
• Economical solution reduces inventory with three available sleeve sizes.

Downloads & Links

• 3M‚Ñ¢Fire Barrier Putty Sleeves ¬†(PDF)
• 3M‚Ñ¢ Fire Barrier Putty Sleeve Kits Brochure ¬†(PDF,¬†741.5KB)
• 3M Fire Protection Products Specifiers Guide ¬†(PDF,¬†106.3MB)
• 3M‚Ñ¢ Fire Barrier Putty Sleeve Kits Product Spec Sheet ¬†(PDF,¬†404.7KB)