Gypsemna’s Tuff Mold and Moisture Resistant Gypsum Plasterboards are made up of non-combustible, mechanically stable and fire retarding high density, moisture resistant, mold and mildew resistant gypsum core, encased in very heavy duty Kraft paper liner on either side. This special purpose gypsum plas- terboard is designed for use in walls or partitions that require superior impact strength, breaking strength, mold and moisture resistance, fire resistance and sound insulation properties, when compared to all other types of gypsum plasterboards This is used for internal applications.