OX-IS® is the four-in-one product that allows you to meet building code requirements for structural sheathing, continuous insulation, and weather and air resistive barrier performance. OX-IS® insulated sheathing starts with a nonreflective resilient exterior facer that provides water resistance and high durability. The closed-cell, moisture-resistant polyisocyanurate foam core provides high compressive strength, a long-term R-value, and a continuous air barrier. A thin, high-pressure laminated member provides even more structural support. Put it all together and you get the highest possible performance from your structural sheathing. Used in place of traditional exterior sheathing products, OX-IS® saves the installer time and provides multiple benefits all in one product.