... civilized, environmental, high efficiency constructionName: EPS Sandwich Wall Panel(JY-FPB1500-3000x610mm)Brand: JYComposition: Fibre reinforced calcium silicon ... color-coated steel sandwich board, gypsum block, wire spatial grid structure perlite board, perlite porous board etc. Interior ... T9978Water tightness to ASTM C1185No droplets observed behind the panel,Test of 24 hours at 250mm water head. ...