JM Corbond Open-cell Appendix x Spray Polyurethane Foam (ocx SPF) insulation is a two-component, non-structural, low-density insulation system designed for interior residential, commercial and industrial applications. It is Class 1 rated and meets AC 377 NFPA 286 Appendix x requirements for application without an ignition barrier in attics and crawl spaces. It is 100% water blown. The low-density nature allows for tremendous yield while providing excellent air, heat and sound control. This multi-functionality results in high-performing buildings that are energy efficient, comfortable, and have better air quality. This product is compatible with most common construction materials.