ToughRock® Mold-Guard™ Gypsum Board is designed for use in interior wall and ceiling applications and, when compared to traditional paper-faced gypsum board, offers enhanced protection against mold and moisture exposure that can cause deterioration and/or stains. It contains a non-combustible core (when tested in accordance with ASTM E136); moisture-resistant treated core; and moisture- and mold-resistant treated, 100% recycled paper facings on the front (green colored), back, and long edges.