Soldering Powerflow Flux - Plumbing 200g A high-quality, self-cleaning soldering flux designed specifically for plumbing applications. This 200g tub of white, paste-form flux is ideal for use with copper and brass pipes, promoting strong, reliable joints. It contains no zinc chloride, ensuring safe use in potable water systems. The flux is water-soluble, allowing for easy cleanup with water, and is compatible with both lead-containing and lead-free solders. Its high-temperature stability makes it suitable for various soldering tasks, including radiator repairs and general plumbing work.