... strength and good toughness 1.Creiorritec UPVC tri-ply heat insulation tile is made from overseas PVC colophony with UV ... areas,brilliant anti-corrosion capcity for chemical,creioritec weatherproof heat insulation tiles have various kinds of colors,they are also very ... interlayer is foamed materials which can improve the heat insulation and sound insulation as well.in raining days,the sound will fade ...