I wouldn't use Duct Tape as you know it. COnsider the HVAC Ventilation Tape (the silver tape) that's used on HVAC systems. That tape can take variations in temperature.
If you wanted, ctc the mfgr. of the aforementioned HVAC tape(s) and see what they say. There's also Tyvek Tape which is expensive. I use that to tape the joints of insulation board when siding. Ctc. the mfgr. too.
Other than that, come back here in a few days to see if anyone else has posted up. My best to ya and hope this helps.