Zecore is Greenguard Gold certified and complies with all V4 LEED requirements. It is tackable, impact resistant and acoustically absorptive. 20mm Zecore provide a .70 NRC rating. It can be used within various types of panel systems as a panel core or it can be installed as is. Zecore is a PET product and made from recylced materials, not fiberglass. It is thermally bonded and has no irritants or harmful VOC's