This is an open question, Pangu Panels is made from MDF ( middle density fiber board), and fiber board will be inflatable as soon as it dipped into the water or in the extremely web environment such as shower room or swimming pool wall. However, the surface of this kind of 3d wall panels is coated by PU paint, and melamine covered on the back side of the panels, thus they are moisture proof, it stand by short moisture environment.

In a whole, we don’t recommend to apply this kind of wall covering material in very wet environment, if you insist on installing in relative wet wall environment, we suggest you use damp-proof MDF instead, or choose other substitute material such as solid wood, PVC 3d wall panels and a lot of more.