... 2 components PU glue through forming machinesSpecifications:(1)Core Material: Rock Wool, EPS, PU; Surface Materials: MgO boards or Steel ... after each 10 years4) Pressing steel panel with the clear line, and many colors for choice, and suit with any ... satisfying effects.5) In common use heat preservation materials are rock-wool, polystyrene,polyurethane, all with lower thermal conductivity and favorable ...