Crystalline Silica. Material grade: dry, heat setting. Recommended use: IFB. Recommended use: IFB. Thermal Ceramics refractory mortars were developed to match Thermal Ceramics dense and insulating firebricks in various thermal, chemical, and physical service conditions. Available in wet and dry grades, mortars will provide the convenience you want with the performance you need for practically every high temperature refractory application. Smoothset™ is a lower cost, tacky, 2800°F (1538°C) mortar. Excellent for built-up shapes.Information provided by Morgan Advanced Materials |