GacoEZSpray F4500 is a two-component water-blown (zero ozone-depleting) liquid spray system that cures to a low-density cellular polyurethane insulation material. This open cell foam is designed to provide: good thermal performance; air impermeable insulation; and, an integral part of an air barrier assembly. GacoEZSpray Open Cell Foam provides high R-value insulation and a seamless air barrier to control air leakage and lower energy consumption. It also reduces condensation, moisture and mold and helps block airborne noise and absorb sound. This all adds up to an energy efficient, comfortable and quiet indoor environment for home and building owners.