NS 10.3 oz. Caulk Tube Thermal Reactive Paste Sealing Compound Rating; 933°C to 510°C PSI; Up to 11,000 A heat curing paste sealant that is used in high temperature and high pressure applications. DEACON 770-P is specially designed to be a flange or thread sealant, 770-P can also be used as a dressing on any type of traditional fabricated gasket. Unaffected by thermal cycling, 770-P will not cement joints together or interfere with future repairs. In the presence of heat, 770-P will form a mechanical-type seal against steam, oils, solvents, hydrocarbons, and a variety of chemicals. Ideal for NPT pipe fittings.