The most popular material used for making heat shrinks is Polyolefin (PE), there are also other materials such as PTFE (Polytetrafluoroethylene), FEP (Fluorinated ethylene propylene), PVDF (polyvinylidene difluoride), Elastomers, Silicon rubber, Viton, and other special materials.

There are also Polyvinyl chloride (PVC) heat shrink tubing which is not so popular now because it is not flame-retardant, but you could still see in the market due to its low cost.