... fire-retardant , lightweight , anti-seismic,sound insulation and lower noise polyurethane decorative wall panel 16 mm 1) Intruduction :"It is composed ... and fire-retardant ,lightweight , anti-seismic,convenient construction,sound insulation and lower noise ,environment friendly and lasting beauty etc., in ... : 3800*380*16mm3, Package : 1.444sqm / pc 8pcs /carton sandwich panel-insulation exterior wall ...