ToughRock® Fireguard 45® Gypsum Board has a noncombustible (per ASTM E136), dimensionally stable, gypsum core. The core is specially formulated, increasing the strength and resistance to the passage of heat. The surfacings on both facings and on the long edges are 100% recycled paper. The front facing (side to be finished) and the long edges are an ivory color; the back facing paper is gray. The ends are square cut, smooth finished with no paper facing. Georgia-Pacific ToughRock® Gypsum Board products are GREENGUARD and GREENGUARD Gold Certified for low emissions of volatile organic compounds (VOCs). They are listed in CHPS® High-Performance Product Database for low emitting products.