Carbon/carbon composites including those structures formed from a fibrous reinforcement itself formed principally from carbon in a carbon matrix are protected against oxidation by multi-layer sealant system preferably including a multi-layer paint including in its carbonized binder refactory granules...http://www.google.de/patents/US5298311?utm_source=gb-gplus-sharePatent US5298311 - Moisture and oxidation resistant carbon/carbon composites
