Ceramic Fiber Blanket (8#, 2300F)(2"x24"x12.5') for Ovens, Kilns, Furnaces, Glass Work, and Chimney Insulation Aluminosilicate Refractory Ceramic Fiber Blanket / Wool 8lb/ft3 (128kg/m3) 2300F (1260C) Maximum Temperature, 2100F Continuous Non-reactive with moisture (unlike mineral wool and vermiculite) Can be cut by knife or with heavy scissors Excellent high temperature insulator