1.heat preservation and sound insolation. 2.long life,light weight 3.anti-corrosion ... machine with solidifying glue. It has excellences of small weight(1/20---1/30 of concrete roof), heat preservation, heat insulation(its heat ... torages,exhibition halls,gymnasiums,freezing stores and purification workshops (tempkeeping,heat insulation,weight bearing,weatherproof,rich color and good appearance) ...