SCPF-1 - Harris Stay-Clean Paste Flux 1 lb Jar

Achieve Professional Solder Joints with Stay-Clean® Paste

For welders, plumbers, and metalworkers looking for a reliable soldering solution, the Harris Stay-Clean® Paste Soldering Flux is a workshop staple. This 1 lb jar provides a substantial supply of high-quality flux that takes the guesswork out of sweating copper pipes or joining dissimilar metals. Whether you are working on a residential plumbing fix, an automotive radiator repair, or a custom metal art project, this flux delivers the aggressive cleaning action needed to break down surface oxides and pull solder deep into the joint.

One of the biggest advantages of Stay-Clean® is its versatility. It works exceptionally well on copper-to-copper and copper-to-brass connections, which are standard in HVAC and plumbing trades. Beyond that, it handles steel, galvanized steel, and even Monel with ease. The paste consistency is smooth and easy to apply with a standard acid brush, staying exactly where you put it without dripping off the pipe before you apply heat. It is compatible with almost all common solders, including traditional leaded bars and newer lead-free wires, giving you flexibility regardless of the filler metal you prefer.

Safety and best practices are important when using an active flux like this. Because it is designed to chemically scrub the metal surface, the residue left behind can be corrosive. It is essential to wipe down your finished joints with a damp rag or warm water to remove any excess flux, ensuring your work stays clean and corrosion-free over time. Remember, this is a powerful industrial flux—keep it away from electronics and aluminum projects. With a working range up to 600°F, it covers the majority of soft soldering tasks you will encounter in the field.