For the record, the tape on the aircraft is in fact not duct tape
The tape is aluminum tape and the 2” costs in excess of $100 per roll
https://www.uline.com/Product/Detail/S-14665/3M-Single-Coated-Tapes/3M-425-Aluminum-Foil-Tape-3-x-60-yds?pricode=WB3547&utm_source=Bing&utm_medium=pla&utm_term=S-14665&utm_campaign=3M%2BTapes&utm_source=Bing&utm_medium=pla&utm_term=S-14665&utm_campaign=3M%2BTapes&msclkid=eb28bb5734341a5f7692e6510dd9401f&gclid=CJ6Q8qGE7uICFeGtZQodpeoKow&gclsrc=ds
You’re right. it is FAA approved official aluminum standard duct tape.