National Gypsum Company is headquartered in Charlotte, NC and is the exclusive service provider of reliable, high-performance ... building products manufactured by our affiliate companies and marketed under the Gold Bond®, ProForm® and PermaBASE® brands. The National Gypsum® name – through our Gold Bond, ProForm and PermaBASE product lines – has been synonymous with high-quality, innovative products and exceptional customer service since 1925. To learn more, visit Nationalgypsum.com. read more