The 100 mph duct tape, military grade, used to be called 90mph tape. That was if you fixed a helicopter rotor blade with it you really didn't want to go over 90mph. Yes, they used the tape to fix bullet holes in rotor blades on the old Hueys, which btw had a top speed of around 90 mph. Or so I was told by a MW5 who could fly most anything.

No, I was not an aviation type, just spent too many years supporting aviation units. I also know what whale sperm is, how many pounds of rotor wash a 5 gallon bucket will hold, and where to get 5 feet of flight line.