Thick-walled heat shrink tubing made of self-extinguishing polyolefin with hot melt adhesive coating, where the adhesive melts and fills all uneven areas and cavities. The penetration of moisture is thus prevented. For ageing, UV and moisture-resistant insulation of plastic and ground cables and as an outer tube for control cable sets. RoHS compliant and halogen-free. The diameter before shrinking is 70 mm and after shrinking 21 mm.