Received the Fall issue of Airstream Life this week (www.airstreamlife.com). It contains an article on the various sealants used at AS and where and how they're used. Addresses Vulkem 116, Sikaflex-221, Parbond, and Acryl-R. Probably nothing new to most of the forum readers, but is interesting. They state that Acryl-R is primarily used when reassembling body panels and Parbond is used for small seams. FWIW.
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