... it can be sticked directly by glass cement+hot melt glue and so on, no need board and nail. save the ... common foam)3).Bottom layer:PU leather( not PVC board, so can be as ceiling panel as well, ... )Characteristic:1).waterproof: so it can be cleaned by usual rag.2).fire proof: PU leather and ... , KTV, hotel, restaurant, lobby, proscenium and so on, for anyinterior places decoration. with amazing effect.