National Gypsum is a fully integrated manufacturer of gypsum board, including the Purple XP family of moisture, mold and mildew resistant products, interior finishing products, cement board, and high-performance roof boards. National Gypsum operates three recycled paper plants (which supply facing paper for its gypsum board), seven gypsum quarries, and a fire, acoustical, analytical and structural testing research center. National Gypsum products are found at market under the brand names Gold Bond, ProForm, PermaBase, and DEXcell.
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