Hello Victor -- Welcome to the Forums! There are other threads to read if you search on the keyword formaldehyde. I think a thread by janetb, http://www.airforums.com/forums/f396...mes-30096.html
, said a lot for lessening outgassing within the first season or so. She posted in a different thread later stating that it had disappeared after a minimum number of months (2-3? I don't recall exactly).
Adhesives with any
plywood or particle board are said to contain formaldehyde unless specifically stated otherwise -- then there would be other constituents. This is not a lot different than volatilization of plasticizers with 'new car smell.' A very sensitive asthmatic might be affected but it doesn't persist for long. I don't think anybody buying a minimally used Airstream would be worrying about this at all.
From a long time Sierra Club-er!