This video is a heating demonstration of a heat shrink tube by the Halogen Ring Heater.
Related page:
Holing in the High Density Polyethylene－HDPE bottle by the Air Blow heater 
Holing and Cutting in polystyrene foam by the Air Blow heater 
Make a hole in the polypropylene PP tray 
Make a hole in the Polyolefin heat-resistant five-layer film 
Heat resistance test of hot water cutting holes in the cup chow mein 
Hole making of PET bottle 
Heating of rubber 100 ℃ and 200 ℃ 
Heating of carbon-fiber-reinforced plastic,CFRP