A heat curing liquid sealing compound used in high temperature and high pressure applications. In the presence of heat, DEACON 4011 will form a mechanical-type seal that is unaffected by thermal cycling. This compound will not cement joints together so, it will not interfere with future repairs of metal-to-metal joints. 4011 will achieve a leak-free seal on similar or dissimilar mating surfaces in steam, hot air, oil, or various chemical environments.