Wall insulation wall insulation rock wool board called it special wool board, it belongs to the state Class A non-combustible fire insulation materials, and has a high compressive strength and tensile strength of the effect. A relatively low moisture absorption and good results. Its stability and good, and does not produce thermal expansion or will shrink resistance, aging resistance and other advantages. And it is also compatible with the exterior wall systems for the construction industry to provide effective insulation resistance, fire resistance and other characteristics. It is often used in walls, roofs noise insulation, fire doors, the firewall. If you need this product now, then come here to buy it. For more information, please visit: http: //www.wqyanmianban.com/product/list.aspx