Yes, Moose Färg type S, F, Dimma and Storuman Skydd are breathable paint. They contain a mininum solid content and drying oil so the vapour can diffuse through the paint. Waterdrops are repelled. Wood can be treated on one side without negative effects. As a breathable paint the types mentioned can be used on any sort of wood including red cedar, douglas and other more difficult substrates. Also applicable on interior wallpaper, stucco and stone (ask advice!).