... steel panel2. Core material---The density of this(mineral)Rock wool is: 120-250kg/m33. Side steel strip or not ... Detailed parameters: 1. Composition: Core materials: EPS, XPS,Rok wool, Glass wool,PU, PUR Surface materials: PPGI, GI, Stainless steel sheet ... insulation Environmental protection Most area-saving Most waterproof Most fire-proof Most sound-insulation Best hanging force Most anti-seismic ...