BROWNELLS BLACK BRAZING FLUX

The Brownells Black Brazing Flux is a premium high-temperature paste flux specifically formulated for demanding silver soldering and brazing applications. Designed to perform in elevated temperature environments, it is particularly effective when used with Brownells Silvaloy 355 Silver Solder and other high-silver-content alloys. Its ability to withstand temperatures up to 1800°F makes it ideal for firearm assembly, repair, restoration, and custom gunsmithing projects that require reliable bonding on difficult-to-solder materials.

Engineered to perform exceptionally well on stainless steel and other refractory metals, Black Brazing Flux helps prevent oxidation while improving solder flow and wetting action during the heating process. The easy-to-control paste consistency allows precise application exactly where it is needed, minimizing waste and improving workpiece cleanliness. Once the job is complete, residue can be removed with hot water for simplified cleanup.

FEATURES

• High-temperature flux for silver soldering and brazing
• Designed for use with Silvaloy 355 Silver Solder
• Excellent for stainless steel and refractory metals
• Working temperature range of 1100°F to 1800°F
• Helps improve solder flow and wetting action
• Reduces oxidation during heating
• Paste consistency allows precise application
• Easy hot-water cleanup
• Ideal for firearm repair, restoration, and custom gunsmithing
• Made in the USA

SPECS

• Brand: Brownells
• Product Name: Black Brazing Flux
• Type: High-Temperature Paste Flux
• Color: Black
• Working Temperature Range: 1100°F - 1800°F
• Item Weight: 1 lb.
• Country of Origin: USA
• Recommended Use: Silver Soldering and Brazing
• Compatible Materials: Steel, Stainless Steel, and Other Refractory Metals
• Not Recommended For: Aluminum, Magnesium, Titanium
• Specification Compliance: Fed. Spec O-F-499 Type B
• Specification Compliance: AMS 3411
• Specification Compliance: AWS FB3-C
• Certification: ISO 9002 Certified

CUSTOMER INSIGHTS

Gunsmiths frequently choose Black Brazing Flux for high-temperature silver soldering projects involving stainless steel sights, ramps, ribs, and other firearm components. Users appreciate its ability to remain effective throughout extended heating cycles, while the paste consistency makes it easier to control than thinner liquid fluxes. Many also value the simple hot-water cleanup after soldering is complete.

The Brownells Black Brazing Flux is a professional-grade high-temperature silver soldering flux engineered for temperatures from 1100°F to 1800°F. Featuring a paste formulation, excellent performance on stainless steel, and compatibility with Silvaloy 355 Silver Solder, it provides the protection, flow enhancement, and reliability required for demanding firearm assembly and custom gunsmithing applications.