These, as mentioned above, are most commonly used heat shrinktubes and have maximum use for temperatures from -55 to 135 °C, and are used by the military, aerospace and railway industries. They are manufactured in a wide range of colors (including clear), which can be used for color-coding wires. Polyolefin tubing shrinks at 143°C. Polyolefin heat-shrink tubing typically shrinks 2:1 diametrically, but there are high-grade polyolefin tubes also available with a 3:1 ratio. Interestingly, polyolefin tubing may survive being touched with a soldering iron.

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