... foam board: basic material: mgo board +EPS/XPS+mgo board. thickness:20mm,40mm,50mm,75mm and ... eps foam board:basic material: mgo board +EPS/XPS+mgo board.thickness:20mm,40mm,50mm,75mm and ... : both mgo board and flame retardant-grade EPS/XPS are fire-resistance materials.green and environment protection, ... way to compound, one is done by automatic product line, the other is coumpound by glue, the first ...