is there a way to make an air tight seal between two sheets of aluminum without soldering, brazing, or welding?

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Burf6 years ago
many varieties glue and caulking compound:
silicone caulk
latex caulk
epoxy glue
urethane glue

also rubber seals, O-rings and gaskets
Kiteman Burf6 years ago
Or simply fold the edges over together two or three times and hammer the folds flat.

connoboarder (author)  Kiteman6 years ago
i wish i could select this as best answer
Hit "best" on Burf's post, and the whole thread counts.
hhnewman6 years ago
Nostalgic Guy's got it; context matters. If you're trying to keep your sandwich clean, that's one issue. If you're making a solar reflecting oven, that's another.
Kiteman's method's great, especially if you have access to a metal folder - the joints are gas tight.

Soda can lids are assembled in a similar way. They don't leak either.
Both Burf & Kiteman a re quite right you could use any of the methods they suggest but it really depends on what you want to do with the joined sheets.
A little more information about what you are making would produce answers that would be far more helpful to you.