Atlas EnergyShield CGF Pro (formerly Rboard Pro) is composed of a Class A fire rated closed cell polyisocyanurate(polyiso) foam core faced with a high performance coated glass facer on the front and back. One side of the product is dark gray for use in open joint rainscreen applications. EnergyShield CGF Pro combines high R-value, durable glass facers, and water resistive barrier attributes in a high performance rigid insulation board. Applicable Standards: UL 2824, ASTM C518, ASTM C1289, ASTM C1289 Type II, Class 2, NFPA 285, ASTM E84 Flame Spread, ASHRAE 90.1 / ASHRAE 189.1 / IECC / IGCC, International Building Code (IBC), International Residential Code (IRC), ICC-ES ESR-1375, California State Insulation Quality Standards, Title 25 Foam Flammability Criteria (T 1231), UL Listed R13089, UL Standard 263 (ASTM E119), PE Evaluation, GreenGuard Gold Certification