Thick-walled and robust heat shrink tubing with thermoplastic adhesive on the inside. Extremely resistant to mechanical stress. Resistant to solvents, acids, and alkalis. Due to the high shrinkage rate, the tubing easily adapts to large diameter differences. Provides reliable protection against moisture and other environmental influences. Ensures reliable insulation and protection of cable connections and terminations, even for use underground. Strain relief for cable connector transitions and protection under extreme mechanical stress.