Refractory Ceramic Fiber (RCF). Temperature Grade: 2300°F (1260°C), 2600°F (1430°C). Fiberfrax® Ceramic Fiber Paper Fiberfrax® ceramic fiber papers are a unique class of products which consists primarily of an alumino-silicate fiber in a non-woven matrix with a latex binder system. A specialized paper-making process to form uniform, …