ITC 100 HT Ceramic Coating A versatile high temperature coating that is proven to achieve outstanding energy savings and refractory protection. It can be used alone or as a base coat for other ITC products. It is used as a covering for ceramic fiber insulation or castable refractory. Rated up to 5,000 degrees F, this material reflects radiant heat back into the furnace, kiln or forge to achieve high temperatures quickly and effectively.