Gland packing https://nday.te.ua/salnykovaia-nabyvka-dlia-obespechenyia-nadezhnoy-rabot-mahystraln-kh-truboprovodov/ is a square cord with elastic properties, which includes graphite. It is made by twisting asbestos-chrysotile thread. The entire cord is impregnated with a petroleum fat composition. It is used in devices and connections that require gland packing to prevent leakage in oil, gas, weakly acidic and neutral environments.