About 3: 1 heat shrink tube

3: 1 double wall heat shrinkable flame retardant sleeve is a type of heat shrink tube. 

The outer layer is made of soft cross-linked polyolefin material and the inner layer is made of hot melt adhesive.

The outer material has the advantages of insulation, anti-corrosion and wear resistance, and the inner layer has the advantages of low melting point, waterproof, sealing and high adhesion.

Specifications

Color:Black

Materials:Polyolefin / Adhesive lining

4:1 shrink ratio:Shrink to 1 / 4 of the original size after heating 

temperature range:-45ºC (-49ºF) to 125ºC (257ºF)

Tensile strength: 10.4Mpa 

Dielectric strength: 15 kV / mm 

Product Detail

【3:1 Ratio】：3:1 heat shrink tube it will shrink up to 33% of original rapid contraction to raise efficiency and can be used for the contraction protection on of irregular shape objects and at the same time solve the problem that the 2 :1 Ratio heat shrink tube is not tight enough after shrinking.

【Material】: Our heat shrink tubing are UL and CSA certified, RoHS compliant, free of formaldehyde (HCHO) that use PE environmental protection material and high molecular elastic material,vw-1 fame retardant grade.

【Adhesive Lined & Dual Wall 】: The heat shrink tube with hot melt adhesive on the inner wall.It can be shrunk by heating with hot air gun.It is easy to use.After shrinking, the inner lining glue will completely seal the materials at the two ends of the connection, so as to achieve better waterproof and insulating Sealing effects

【Feature】: Sealing, waterproof, strain buffering, outer self extinguishing ,Dual wall thickness, while maintaining flexibility, improves mechanical protection strength with good viscosity .Our heat shrink tubing it very soft and elastic can effectively retardant , excellent Insulation performance.

【Widely Used】: Heat shrink tubes are mainly used for anti rust and anti-corrosion protection of wire connection solder joints and insulation treatment of wire ends, wire harnesses and electronic devices, surface protection of fitness equipment parts and steel structures, identification of other products of wire boxes, etcA