3M 7100035288 Fire Barrier Pass-through Foam Plugs 4 in

Product Description

The 3M 7100035288 is a replacement foam plug set designed for use with 4-inch round 3M Fire Barrier Pass-Through Devices. These foam plugs serve as the cold and hot smoke seal component within the pass-through assembly. When combined with 3M Fire Barrier Sealant or Putty MP+, the device can achieve a UL classified L-Rating. The pass-through system uses a fixed intumescent material that expands rapidly under fire conditions, sealing the interior of the device to limit the spread of smoke and fire between building compartments. These plugs are installed by fire protection contractors and electricians working on penetration firestop assemblies in commercial and residential construction.

These foam plugs are used as direct replacements in 4-inch round Fire Barrier Pass-Through Device installations. Each device ships with two foam seals from the factory; this SKU provides replacement units when existing seals require substitution. The pass-through devices are commonly installed in wall and floor-ceiling assemblies where cable bundles or conduit penetrate fire-rated barriers. In multi-device configurations using square pass-through units, additional foam seal management may be required for larger cable management and firestop compliance needs. Replacement plugs are sold separately from the mounting brackets and the intumescent device body.

Key Features

• Designed as replacement foam plugs for 4-inch round 3M Fire Barrier Pass-Through Devices
• Provides cold and hot smoke seal performance within the pass-through assembly
• Compatible with 3M Fire Barrier Sealant or Putty MP+ to achieve UL classified L-Rating
• Works in conjunction with the fixed intumescent material built into the pass-through device body
• Intumescent material expands under fire conditions to block smoke and fire spread between compartments
• Sold separately from mounting brackets and the primary pass-through device

Compatibility

Designed for use with the 4-inch round 3M Fire Barrier Pass-Through Device. For full L-Rating performance, use with 3M Fire Barrier Sealant or Putty MP+ per system details. Mounting brackets and additional foam seal replacements are sold separately.

Installation Notes

Installation should be performed by a licensed fire protection contractor or journeyman electrician familiar with UL-classified firestop system requirements. Before servicing or replacing foam plugs in an existing assembly, verify the penetration is de-energized and follow the applicable building and fire codes for firestop penetration work. Consult the published UL system detail for the specific pass-through device configuration to confirm correct placement of the foam plug within the assembly. Do not substitute components or alter the assembly in ways not covered by the listed system detail.

Technical Specifications

• Device Shape: Round
• Device Size: 4 inches
• UPC: 00051115187919
• Unit of Measure: Each
• Minimum Order Quantity: 1

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100035288