Cork spray for building coating

Does anybody have any experience using cork spray? It seems like it may be a good way to weatherproof a building. I want to make a tiny house on skids as my first upgrade from my tent. I will possibly use pallet boards as the exterior wall with the cork spray to keep rain out. You can spray it or use a trowel to apply.

The companies that manufacture it tout it as eco friendly. How eco is it?