In addition to the common high temperature environment, high-temperature heat shrink tubes are also used at the end s/ or insulated parts of some wire and cable materials, as well as at the connections of these wire and cable. In some environments where chemical reagents are eroded, we can also use high-temperature heat shrink tubes to protect our products. The oil-resistant and corrosion-resistant tube shrivelled by high temperature has been well played. With the help of high-temperature heat shrink tubes, we can effectively isolate wire and cable from its working environment so that some harmful substances in the working environment and media do not damage the wire and cable or welding points, we can also use high-temperature heat shrink tubes to protect small components on some electronic components, such as resistors and capacitors, and on the surfaces of some metal products, if covered with a layer of high-temperature heat shrink tube, they will also avoid corrosion and rust.