Heat-shrinkable sleeve series products are designed for the anti-corrosion of welding joints of buried and overhead steel pipes and the anti-corrosion sealing of heat-preservation pipes. They can also be used for the sealing anti-corrosion of pipe flange connection parts and lock hoop parts.It is composed of radiation crosslinking polyolefin base material and special sealing hot melt adhesive, which can form good adhesion with polyethylene base material, steel tube surface and solid epoxy coating.When heat shrinkable sleeve is installed, the base material is in radial shrinkage at the same time, the inner composite rubber layer is melted, tightly wrapped on the filling mouth, together with the base material, a solid anti-corrosion body is formed outside the pipe, which has excellent wear resistance, corrosion resistance, impact resistance and good anti-ultraviolet and light aging performance.