I have over my time here found many posts about not being able to find a tape that will stick to the exterior. Well I found a real Canadian way: Hockey tape, yes that. I used it to mount a carbon filter screen for dirt coming in via vents. The tape works like a charm. No doubt aboot it eh?!?! 
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Thanks for sharing the tip. 
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Duct tape should work, I think it evens sticks to air.
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Duct tape and gorilla tape don’t stay stuck after a few days. It shocked me especially the Gorilla tape. I use it everywhere and it’s a tank. Week in the hockey tape it still stuck where I put it without curling.
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Got plenty of that on hand. Thanks for the tip
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Hockey tape only came in black when I used it last. Like 65 yrs ago.
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Gaffers tape…
Spendy but made to hold wires on different surfaces.
https://www.amazon.com/s?k=gaffers+tape&ref=nb_sb_noss_1
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I am currently trying a few different kinds of tape on exterior of tent with and without weight to see which ones work best. Results to come.
Tuck tape its blue designed 4 vapor barrier
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