Reinforced heat shrink splice closure system is designed to provide excellent split resistance, environmental and mechanical protection for cable joint. The sleeves are made from a composite laminate material consisting of reinforcing glass fibers, polyethylene layer, an aluminum layer for moisture vapor transmission and hot melt adhesive on the inner surface. The sleeves are supplied in wraparound form along with stainless steel channels to make the sleeves cylindrical prior to shrinkage. The outer surface of the sleeves are coated with temperature indicating paint which changes color to indicate optimum shrinking. On application of heat, the inner adhesive layer melts and bonds to the cable surface to provide a waterproof seal.