Regarding heat shrink tube,maybe it is common in your life,but If I ask you about the material of heat shrink tubing,you may not know much.

In fact, when you purchase heat shrink tube,It’s better for you to have a good acquaintance of the materials of heat shrinkable tube so that you can use it more effectively.

Next I’ll introduce the materials of  heat shrink tubing.

One : polyolefin

Polyolefin is the most common kind, has maximum continuous-use temperatures from -55 to 135 °C, and are used by the military, aerospace and railway industries. They are flexible and fast-shrinking, and manufactured in a wide range of colors (including clear), which can be used for color-coding wires. With the exception of black, they tend to have lower resistance to ultraviolet light; accordingly, only black is recommended for outdoor applications. A common shrink ratio is 2:1, but high-grade polyolefin heat shrink is also available with a 3:1 ratio

Two:Silicone rubber

Silicone rubber is generally non-reactive, stable, and resistant to extreme environments and temperatures from −55 °C to +300 °C while still maintaining its useful properties. Due to these properties and its ease of manufacturing and shaping, silicone rubber can be found in a wide variety of products

Three:PVDF

PVDF is used generally in applications requiring the highest purity, strength, and resistance to solvents, acids and heat ect.

material of heat shrink tubing PVDF

Four:PTFE

PTFE (fluoropolymer) has a wide operating temperature range (-55 to 175 °C), a low coefficient of friction, and high resistance to chemicals and punctures.

Referring to the introdution above, I believe you have a good understanding of heat shrinkable tubing. Thus you can have a clear aim to buy your needed heat shrink tube.
More information ,pls browse www.dicoretubing.com