Profile: Gypsum Supply Co. supplies drywall, plaster, insulation, acoustical tile & grid, steel framing, EIFS, exterior systems, stone veneer, tools and accessories. Our plasters are suitable for all interior plastering except where directly exposed to free water or severe moisture conditions. They are non-combustible and act to prevent passage of intense heat from fire for extended periods. Veneer plaster systems consist of a 4 feet wide gypsum plastering base with a absorptive paper surface that is covered with thinly troweled, special purpose plasters. It can be specified for virtually all types of partition and ceiling constructions including wood or steel framing of furring & masonry. It is used in both residential and commercial buildings. We offer firestop coatings, putties, mortor, devices, sleeves and compounds.