Icynene's 55 gal. Drum High-R 80 Open-Cell PMDI Isocyanate Spray Foam Insulation, Side A contributes to the formation of lightweight open-cell insulation that expands into gaps, penetrations, wall cavities, ceilings, and other difficult-to-insulate spaces. When combined with the compatible resin component and applied according to manufacturer guidelines, the system helps create an effective air barrier while supporting long-term indoor comfort and energy efficiency. Suitable for professional insulation contractors, this all-season spray foam component is an essential part of a high-performance open-cell insulation system designed for reliable results.