Worldwide Supplier of Industrial Insulation Components For over forty years, Refractory Specialties has supplied industrial insulation components as a part of Ferro Corporation’s Refractories Division. In 1992, Refractor......Worldwide Supplier of Industrial Insulation Components For over forty years, Refractory Specialties has supplied industrial insulation components as a part of Ferro Corporation’s Refractories Division. In 1992, Refractory Specialties was purchased by its managers and established as a separate corporation. The experienced production, technical and service staff continues to meet your needs for high quality products and excellent service. With a vision toward the future, RSI continues to expand the use of high temperature insulation and refractory products to satisfy new applications in these industries: Appliance, HVAC, metals, fuel cell, solar energy, fire protection, petrochemicals, industrial process furnaces, food industry, solid fuel appliances and high temperature gaskets.