Communication cold shrinkable tube adopts silicone rubber as raw material, preexpanded on the extractable support tube, and shrinks by elastic retraction force at room temperature.

Compared with heat-shrinkable products, it does not need to be heated by tools, and can be sealed tightly even under the condition of thermal expansion and contraction, and will not produce gaps due to thermal expansion and contraction.

It also has the process of lining with mastic to increase the sealing performance of the product, which has the advantages of insulation, sealing, protection, small volume, convenient and rapid operation, no need for special tools, and wide range of application.