How to use heat shrink tubing By Jenny Freeland | July 20, 2012 | Last updated on November 7, 2022 Email Newsletter Get the newest photos, videos, stories, and more from Trains.com brands. Sign-up for email today! Get Updates Having trouble viewing this video? Please visit our Video FAQ page When working on a wiring project, it’s a good idea to protect solder joints. Model Railroader associate editor shows you an easy method using heat-shrink tubing.