EnviroSeal No Mix is a two-component, open-cell spray polyurethane foam light-density insulation system that does not require mixing or agitation of the resin prior to application. EnviroSeal No Mix is a low viscosity .5 density open cell insulating material that is designed to provide significant control of air infiltration, as well as high R-value per inch. When properly installed by an approved applicator, this material quickly expands to fill cracks, crevices, gaps, and voids that exist in every structure. It is the optimal insulation for residential, industrial, and commercial applications.