Thick wall polyolefin heat shrink with a 31 ratio shall be used to insulate, seal and protect electrical splices and terminations where maximum flame retardancy and exceptional insulating and sealing characteristics are required. The adhesive lined inner wall shall seal and protect against moisture. The heat shrink tube shall be suitable for direct burial according to UL 486D and UL Recognized for sunlight (UV) resistance and VW-1 flame rating for outdoor applications such as solar and wind. The thick wall tube shall be CSA certified and RoHS compliant.