👉 Junction fluid, also known as sealant or jointing compound, is a specialized lubricant and sealant used in mechanical systems to ensure proper sealing and reduce friction between mating surfaces, particularly at joints, bearings, and seals. Composed of a blend of oils, waxes, and sometimes polymers, it forms a thin, protective film that prevents metal-to-metal contact, minimizes wear, and dissipates heat. This fluid is crucial in maintaining the integrity and longevity of mechanical components by ensuring a tight seal, especially under varying operating conditions such as temperature changes and pressure fluctuations.