The Prevost seal consists of 4 straight sections and 4 90 degree corners whose radius matches that of the slide and the frame around the slide.

Those seals have 8 joints therefore that are bonded or vulcanized so the seal is one continuous rectangular loop. The seal can be inflated and there will be no loss of air pressure so the bonded joints possess the same integrity as the seal itself. I would like to know how a seal without a bonded joint can work and how it handles the radius around the slide room. I am not saying it doesn't work, but I am suggesting if it does work as well it would be a simpler, cheaper alternative to the fabricated rectangle. I would also like ot know how the air inlet is secured.