Airstream installs furniture and cabinets over the "floating" sheet vinyl that is why my floor has buckled in several areas around cabinets and the dinette.
I've given up worrying about whether product A vs product B is suitable for RV use or warranty because there isn't anything made specifically for RV use.
I'm going with a 2.5mm LVT glued down floor and will probably take up my rear dinette, lounge and queen bed frames and remove the existing sheet flooring and then the installer will lay the floor. In the hallway and around the kitchen cabinets they will leave a small gap and fill in with a clear caulking. I don't want quarter round.
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
2010 Tundra 5.7L, Double Cab, 2wd, White