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Manufacture high-temperature ceramic-fiber and soluble-fiber insulating products, including ceramic-fiber blankets, boards, modules, pumpable forms, papers, textiles and bulk forms, for worldwide distribution. Applications include furnace and specialty insulation, fire retardation and engineered fibers.

Produce and market kaolin and ball clays, silica sands, ground and microcrystalline silica, feldspar and nepheline syenite for the pressed wares, cast wares, formed wares, enamel and ceramic-powder industries. Operations throughout North America with technical service and worldwide distribution.

Produce aplite, round angular and subangular whole-grain sand, ground silica, fine-ground silica and assorted clay materials. Material available in bulk and bagged quantities.

Established 1960. Manufacture electrofused raw materials for abrasives, ceramics and refractories, including white and brown alumina, mullite, magnesia-alumina spinel, fused magnesia, nonstabilized and calcia- and magnesia-stabilized zirconia, calcium zirconate, chromia-alumina, mullite-zirconia and calcium aluminate cements. Manufacturing plant in Brazil.