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This video is a demonstration in the air of 400 ℃ Heat shrink film of battery by the Air Blow Heater.
Related page:
Make a hole in the Polyolefin heat-resistant five-layer film 
No.4 Film shrink 
Shrinkage of heat shrink tube with heat resistance of 200℃ 
Heating of the heat shrink tubing with the Halogen Ring Heater 
No.93 Heat shrink the capacitor 
Heat-hardening of refractory putty 
Heat resistance test of hot water cutting holes in the cup chow mein 
Heat curing of special polyurethane adhesive