Flux

Flux is a paste or liquid applied to copper pipes and fittings before soldering to clean the surfaces and promote the flow of solder. It helps remove oxidation, debris, and impurities, ensuring a clean joint that allows the solder to bond effectively with the metal. Flux also helps prevent further oxidation during the soldering process, resulting in a strong, leak-proof connection. It is an essential material in plumbing for joining copper pipes in water supply lines, heating systems, and other applications. Proper application of flux, including evenly spreading it on the pipe and fitting surfaces, is critical to achieving reliable solder joints. After soldering, any remaining flux should be cleaned off, as prolonged exposure can cause corrosion or damage to the joint over time.