3M 7010398879 Heat Shrink Sleeve 0.5 in Red Polyolefin 3:1

Product Description

The 3M 7010398879 is a red polyolefin heat shrink sleeve designed to protect wire terminations, splices, and conductor bundles in electrical installations. With a 3:1 shrink ratio, the sleeve starts at 0.5 inches inside diameter and shrinks down to 0.16 inches after heat is applied at a shrink temperature of 249.8 degrees F. Each sleeve measures 6 inches in overall length and features a post-shrink wall thickness of 0.07 inches, providing a firm, insulating layer over the covered conductor. Licensed electricians and electrical maintenance technicians use this sleeve for color-coded wire identification and environmental protection in both fixed and flexible wiring runs.

This heat shrink sleeve suits residential and commercial electrical wiring applications where corrosion resistance, fluid resistance, and fungus resistance are required. It is compatible with wire sizes ranging from 10 AWG to 2 AWG, covering a broad range of branch circuit and feeder conductors. The red color makes it useful for phase identification or circuit coding in panel work, junction boxes, and conduit runs. Each package contains 10 sleeves, and the minimum order quantity is 1 package.

Key Features

• 3:1 shrink ratio allows use over a wide range of conductor diameters from 10 AWG to 2 AWG
• Polyolefin construction provides corrosion resistance, fluid resistance, fungus resistance, and water resistance
• Shrink temperature of 249.8 degrees F for controlled, consistent application with a heat gun
• Operating temperature range of -67 degrees F to 230 degrees F for use in demanding environments
• Post-shrink wall thickness of 0.07 inches delivers durable mechanical and dielectric protection
• Red color supports visual wire and phase identification in multi-circuit installations

Compatibility

Designed for use with wire sizes from 10 AWG to 2 AWG. Fits standard electrical conductors within the pre-shrink inside diameter of 0.5 inches. Suitable for OEM-style and field-service applications in electrical panel, conduit, and junction box work.

Installation Notes

Installation is performed by licensed electricians or qualified electrical technicians. De-energize and lock out the circuit before applying heat shrink sleeves to any conductor or termination. Use a calibrated heat gun to apply even, consistent heat around the sleeve — do not use an open flame. Follow applicable NEC requirements for wire insulation and termination methods at the point of installation.