SCPF4 - Harris Stay-Clean Soldering Paste Flux 4 oz Brush Cap Jar

Professional Grade Flux for Leak-Proof Joints

Achieve flawless soldering results with the Harris Stay-Clean® Paste Flux, a staple in the toolkits of professional welders, plumbers, and pipefitters. This 4 oz jar (SCPF4) features a built-in brush cap, allowing for rapid and precise application directly to the workpiece. Designed primarily for copper-to-copper and copper-to-brass connections, this flux is the go-to solution for creating watertight seals in plumbing and heating systems. Its advanced formula aggressively removes surface oxides and impurities, preparing the metal surface for optimal solder penetration and bonding.

The versatility of Stay-Clean® Paste Flux extends beyond simple copper piping. It is formulated to work effectively on a broad spectrum of metals, including bronze, steel, galvanized steel, and Monel®. This makes it an invaluable consumable for general maintenance, repair, and fabrication shops where diverse materials are encountered. The paste form is specifically engineered to resist running, which is critical when soldering large diameter pipes or fittings in difficult positions. By maintaining a coating over the joint area during heating, it prevents re-oxidation and ensures the solder is drawn deep into the fitting cup by capillary action.

Compatibility is key in modern welding and soldering operations. Harris Stay-Clean® works excellently with most commercial solder alloys, including tin-lead, tin-antimony, and modern lead-free eco-friendly solders. This flexibility allows you to use a single flux for various jobs, simplifying your inventory. The flux operates effectively within a temperature range up to 600°F (316°C), covering the melting points of standard soft solders used in the industry.

Post-solder cleaning is an essential step when using this product. The flux residues are corrosive, which aids in the cleaning process during heating but can cause corrosion if left on the part. A simple wash with water or a damp rag is typically sufficient to remove the residue, leaving a clean, bright joint. Note that this product is not intended for aluminum, magnesium, or titanium, nor should it be used for electronics. For robust, mechanical soldering tasks, Harris Stay-Clean® delivers the performance professionals trust.