... Core Materials Option: Polystyrene(EPS), Polyurethane(PU), and Rockwool. Rockwool Sandwich panel Prefabricated color steel plate Sandwich Panel is composed ... )Core Materials Options: Polystyrene(EPS), Polyurethane(PU), and Rockwool Thickness:50mm,75mm,100mm,150mm,200mm. the density is 8 ... wall or roof for cold storages.2.c)Rockwool Sandwich panel *Rockwool is featured with the best fire-resistance among ...