... kind of light-weight building material. 1)Polyurethane Sandwich Panel or heat preserving decorating metal board is a new kind ... Heat preserving, heat insulation, water prroof, impact resisting, pressure resisting, fire proof, quake resisting, light weight, easy to construct, beautiful, durable, ... constrution: we have our own fittings system to fix the panel.First ,fix the keel on the wall surface and ...