MIL-S-8516E, MILITARY SPECIFICATION: SEALING COMPOUND, SYNTHETIC RUBBER, ELECTRIC CONNECTORS AND ELECTRIC SYSTEMS, CHEMICALLY CURED (30 JUL 1971) [S/S BY MIL-PRF-8516G]., This specification covers a two-component, chemically cured synthetic rubber compound for insulating, sealing, reinforcing, and corrosion protection of electric connectors, wiring, and other electric apparatus. This specification has provisions for shelf-life extension (see 3.2.4).