You can make an impact with Flexible Gypsum Panels that are ideal for easy construction of curved walls, ceilings, arches and stairways. CGC Sheetrock® Brand Gypsum Panels Flexible 6.4mm (1/4") are more flexible than standard panels of the same thickness. CGC Sheetrock® Gypsum Panels Flexible have a noncombustible gypsum core encased in 100% recycled face and back paper and tapered edges allow easy final decoration.