They sound like a great idea
Guess I kind of made my own version when I replaced the the rivets on my Trillium
I gave the rivet gun two pulls -stopping before the shank snapped - then cut it off flush with the rivet head using a Dremmel tool and a cut off disk. The aluminum is soft and kind of smooshes together.
Here is a picture of my furnace
vent rehab and the sealed rivet heads.