Understanding Non-Heat Shrink Tubing and Sleeves: Materials, Uses and Benefits Walk into any electrical panel room or industrial assembly line and you will see wires everywhere. Some are bundled. Some are exposed to vibration. Some run close to heat sources. What protects them is not always heat shrink. Read more. https://writeupcafe.com/understanding-non-heat-shrink-tubing-and-sleeves-materials-uses-and-benefits