This is a 33 meter roll of polyimide tape. This tape is a fantastic insulator, like electrical tape, but it can withstand temperatures as high as 258°C (496°F). It also provides good resistance to corrosion and the silicone adhesive holds tight throughout the tape's rated temperature range. This is a good choice for insulating components inside of an enclosure that might be subjected to extreme conditions.
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Very good stuff for wrapping Lipo Battery, Watt Resistor and it says Kanton on the tape . One interesting property of it is the ability to block high frequency visible light and possibly UV. I covered some area on a glow in the dark stickers and couldn't charge the covered area with bright LED ! I have seen people used it to as a masking pad for hand soldering smd on prototyping boards