Certainteed Insul Safe SP Blowing WoolInsulSafe SP is a fiberglass blowing insulation used in residential and commercial construction as a thermal and sound absorbing insulation. It is designed for pneumatic installation in open (attic) and closed (sidewalls floor) construction cavities. It may be used in retrofit applications. Benefits: Better coverage Thermally efficient Excellent sound control Won't settle Lasts for life of the home to reduce energy demand and costs Environmentally