It is composed of a radiation-crosslinked polyolefin substrate and a specialized sealing hot-melt adhesive coating. The specialized sealing hot-melt adhesive achieves excellent adhesion to polyethylene substrates, steel pipe surfaces, and solid epoxy coatings. When heated, the heat-shrink sleeve uniformly contracts radially while the hot-melt adhesive layer melts, enveloping the pipe surface or joint area evenly. Together with the substrate, it forms a robust corrosion-resistant barrier around the pipe, offering resistance to cathodic delamination, chemical corrosion, UV radiation, and aging.