When you are about to buy Heat Shrink Tubing, the questions you are always asked is that what kinds do you want to buy and what the material you actually need. For this reason, we’ll talk about the materials of it.

In fact, different applications require different materials. PTFE (fluoropolymer) tubes  from Heat shrink tubing wholesalers have the widest operating temperature range (−270 to 260 °C), low coefficient of friction, and high resistance to chemicals (almost everything except molten alkali metals, fluorine gas, and chlorine trifluoride). They however have very high shrink temperature (325–340 °C, or 250 °C).

The Heat Shrink Tubing has to be heated uniformly until it becomes clear, a sign of the polymer changing from crystalline to amorphous; on the transition back to crystalline the tube shrinks. 1.5:1, 2:1 and 4:1 shrink ratios are available on the market.

Perhaps ,Viton, another fluoropolymer with high chemical resistance. Highly flexible. Shrink temperature is 120 °C. Polyvinylidene fluoride (PVDF) tubes are intended for high temperature applications; −55 °C up to 150 °C (flexible PVDF) or up to 175 °C (semi-rigid Kynar).

Their coefficient of friction is second only to PTFE. The material is resistant to abrasion, cut-through, ultraviolet and gamma radiation, and is up to 3 times as strong as standard polyolefin. The Heat Shrink Tubing is rated for use in plenum spaces. Common shrink ratio is 2:1, and shrink temperature ranges around 170 °C