BROWNELLS NO.4 COMET FLUX

The Brownells No. 4 Comet Flux is a specialized soldering flux developed specifically for use with Brownells Hi-Force 44™ Solder. Formulated to clean metal surfaces during the soldering process, this high-quality flux helps remove oxides and contaminants that can interfere with solder adhesion, resulting in stronger, more reliable joints on firearm components and other metalwork projects.

Designed for gunsmithing applications, No. 4 Comet Flux works exceptionally well on steel, stainless steel, nickel, brass, and copper. By preventing black oxide formation during heating, it helps reduce cleanup time and contributes to cleaner, more professional-looking solder joints. Whether installing sights, attaching ribs, mounting scope bases, or performing restoration work, this flux promotes improved solder flow and stronger bonds.

FEATURES

• Formulated specifically for Hi-Force 44™ Solder
• Removes oxides and contaminants from metal surfaces
• Promotes strong, reliable solder joints
• Helps improve solder flow and adhesion
• Prevents black oxide formation during soldering
• Reduces cleanup time after soldering
• Suitable for steel, stainless steel, nickel, brass, and copper
• Ideal for firearm assembly, repair, and restoration
• Easy-to-use flux formulation
• Made in the USA

SPECS

• Brand: Brownells
• Product Name: No. 4 Comet Flux
• Application: Soldering and Metal Joining
• Form: Powder
• Color: Clear
• Container Size: 6 fl. oz.
• Item Weight: 0.375 lb.
• Quantity: 1
• Country of Origin: USA
• Recommended Use: Brownells Hi-Force 44™ Solder
• Compatible Materials: Steel, Stainless Steel, Nickel, Brass, Copper

CUSTOMER INSIGHTS

Gunsmiths frequently pair No. 4 Comet Flux with Hi-Force 44™ Solder for sight installations, rib work, and other firearm soldering projects. Users appreciate its ability to improve solder flow while helping prevent oxidation that can compromise joint quality. The reduction in post-solder cleanup is also a commonly valued benefit.

The Brownells No. 4 Comet Flux is a purpose-built gunsmithing flux designed to maximize the performance of Hi-Force 44™ Solder. By removing oxides, promoting solder adhesion, and reducing black oxide formation, it helps produce strong, clean solder joints on steel, stainless steel, brass, copper, and nickel components while simplifying cleanup after the job is complete.