Using Silica Based Rigidizer Ceramic fiber products are so porous that water runs right through them, unlike solid refractory, which must be slowly dried out, and then heat cured to prevent damage from build up of steam pressure. So, ceramic fiber can be "cured as you go," which means that nothing prevents you from slowly rotating an outer layer of blanket on a curved surface, spritzing the rigidizer to each area that is laying flat under the weight of the liquid, using your burner (turned