3M 7010400848 Heat Shrink Tubing 3/8 in 48 in Red

Product Description

The 3M 7010400848 is a multiple-wall, semi-rigid heat shrink tubing designed for electrical insulation, strain relief, and environmental sealing in demanding wiring applications. Built from polyolefin with a 2.5:1 shrink ratio, this tubing features a co-extruded construction with a selectively cross-linked outer wall and a meltable inner wall that flows during recovery to create a moisture-resistant seal around conductors and connections. Each stick measures 48 inches in length and ships in a standard case quantity of 125 pieces. Licensed electricians and low-voltage installers use this tubing to terminate, bundle, and protect wire splices, connector backshells, and cable entries in electrical panels, control wiring, and field-assembled harnesses.

This tubing is suited for residential and commercial electrical work where a dual-wall construction is needed to provide both mechanical protection and an adhesive-type inner seal. The red color aids in circuit identification or phase coding during installation. Standard applications include protecting wire splices, cable ends, and connector terminations exposed to moisture, vibration, or abrasion in electrical and light industrial environments.

Key Features

• 2.5:1 shrink ratio for reliable recovery over a range of conductor and connector diameters
• Multiple-wall construction with meltable inner wall that flows and seals during heat application
• Semi-rigid polyolefin outer wall resists abrasion and provides mechanical protection after recovery
• 48-inch stick length allows field cutting to exact required lengths
• Red color for circuit or phase identification in multi-circuit wiring systems
• Case quantity of 125 pieces supports production or high-volume field use

Compatibility

Designed as an OEM-style dual-wall heat shrink solution for use on standard wire and cable terminations where a 3/8-inch recovered inner diameter and adhesive-style inner wall seal are required.

Installation Notes

Installation is performed by licensed electricians or qualified wiring technicians following applicable NEC guidelines. De-energize and lock out all circuits before applying tubing to any conductor or termination. Apply uniform heat using a calibrated heat gun, working from the center outward to prevent air entrapment and ensure even inner-wall flow. Do not use an open flame as a heat source, as uneven heat can cause charring or incomplete recovery.

Technical Specifications

• Shrink Ratio: 2.5:1
• Wall Type: Multiple-wall, semi-rigid with meltable inner wall
• Material: Polyolefin (co-extruded, selectively cross-linked)
• Nominal Size: 3/8 inch
• Length per Stick: 48 inches
• Color: Red
• Weight: 0.07 pounds
• Case Quantity: 125 pieces
• Unit of Measure: Each
• UPC: 10051128599164

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010400848