Icynene developed its 100% water-blown spray-foam insulation as an alternative to medium-density chemically based closed-cell products. For residential and commercial use, ProSeal Eco offers an R-value of 4.9 per inch of thickness and serves as a Class II vapor retarder at 2.4 inches. The semi-impermeable product can be used with a range of substrates and in a variety of climates. Icynene, 800.758.7325, icynene.com