Introduction

Use this guide to learn how to use heat shrink tubing to repair frayed sheathing on a wire or cable.

Image 1/1: Heat shrink tubing has a shrink ratio that dictates how much the tubing will shrink once heated, so it's important to choose the right ratio for the job. For example, a length of 2:1 ratio tubing with a diameter of 2 mm will shrink to a diameter of 1 mm.
  • Measure the diameter of the wire, and then choose a piece of heat shrink that will be large enough to slide onto the wire before heating but will still provide a snug fit once heated. The shrunken diameter should be slightly smaller than the wire's diameter to ensure a tight fit.

    • Heat shrink tubing has a shrink ratio that dictates how much the tubing will shrink once heated, so it's important to choose the right ratio for the job. For example, a length of 2:1 ratio tubing with a diameter of 2 mm will shrink to a diameter of 1 mm.

Add Comment

Image 1/2: Most heat shrink tubing will also shrink longitudinally (around 5-15%), so be sure to give yourself enough tubing to cover the exposed area after heating. Image 2/2: Most heat shrink tubing will also shrink longitudinally (around 5-15%), so be sure to give yourself enough tubing to cover the exposed area after heating.
  • Measure a length of heat shrink tubing that is slightly longer than the damaged section of wire.

    • Most heat shrink tubing will also shrink longitudinally (around 5-15%), so be sure to give yourself enough tubing to cover the exposed area after heating.

Add Comment

Image 1/1:
  • Use a pair of scissors to cut the tubing to the appropriate length.

Add Comment

Image 1/2: Image 2/2:
  • Slide the tubing onto the wire so that it covers the damaged/exposed section.

Add Comment

Image 1/3: Keep the heat gun moving back and forth along the length of tubing, as staying in one place can damage the wire even further. Image 2/3: Continue heating the tubing until it is tightly secured to the wire. Image 3/3: Continue heating the tubing until it is tightly secured to the wire.
  • Use a heat gun to shrink the tubing.

    • Keep the heat gun moving back and forth along the length of tubing, as staying in one place can damage the wire even further.

  • Continue heating the tubing until it is tightly secured to the wire.

Add Comment

Finish Line

9 other people completed this guide.

Geoff Wacker

Member since: 09/30/2013

57,461 Reputation

109 Guides authored

0 Comments

Add Comment

View Statistics:

Past 24 Hours: 5

Past 7 Days: 23

Past 30 Days: 77

All Time: 659