... mineral wool, and the top board, back board are steel plate.2 FeaturesIt gathers Insulation, heat insulation, bearing, waterproof up, and ... disassemble and the short production per Insulation board1 MaterialWall panel sandwich board is made up of foam, polyurethane ... mineral wool, and the top board, back board are steel plate.2 FeaturesIt gathers Insulation, heat insulation, bearing, waterproof up, and ...