The JM Corbond III SPF is a premium, high-yield spray polyurethane foam building insulation. Fast, easy and adaptable, it can be applied at temperatures as low as 20° F and can achieve R-21 with only 3 inches of materials in a 2x4 stud cavity. The product is generated onsite by combining an isocyanate and a polymeric resin through a dual-component proportioner. It is well suited for residential, commercial and industrial applications. As one of the most advanced insulation solutions, it offers climate isolation between indoor and outdoor environments.