Lucas-Milhaupt 75014 Silver Brazing Flux

As a veteran contractor, you know that joint integrity in HVACR systems is only as good as your oxide removal. The Lucas-Milhaupt 75014 Silver Brazing Flux, also known as Ultra Flux, is a high-temperature brazing flux specifically engineered for silver-based filler metals. This water-based, active fluoride/borate paste provides a creamy consistency that ensures excellent part adhesion whether you are working with ferrous or non-ferrous metals like copper, brass, and steel. It is effective to 1,600°F and becomes fully molten at 1,100°F, protecting the base metal from heavy oxidation during the heating cycle and reducing surface tension to facilitate deep capillary action. Provided in a convenient 7 oz. brush top container, this silver brazing flux minimizes spattering and is compatible with various heating methods including torch, induction, and furnace brazing. For critical refrigeration and air conditioning repairs, it is the industry standard for ensuring leak-free connections between high-silver alloys and phos/copper alloys.

• Wide Temperature Range: Remains active and effective from 1,100°F to 1,600°F, ideal for most HVACR silver brazing applications.
• Superior Wetting: Promotes the flow of filler metal into the joint by aggressively removing surface oxides.
• Professional Application: The integrated brush-top cap allows for precise, mess-free application directly to the joint.
• Broad Compatibility: Suitable for joining steel, stainless steel, copper, and nickel alloys (not for use on aluminum, magnesium, or titanium).
• Easy Post-Braze Cleanup: The corrosive residue is water-soluble and can be removed with hot water (120°F+) after the joint has cooled.

What is the best flux for silver brazing copper to steel?
The Lucas-Milhaupt 75014 is specifically designed for this. Its active chemical properties allow it to clean both copper and ferrous metals simultaneously, ensuring a high-strength bond when using high-silver alloys.

Can I use this flux for aluminum brazing?
No, Ultra Flux 75014 should not be used on aluminum, magnesium, or titanium. These metals require specialized fluxes designed for their specific oxide-removal temperatures and chemical properties.

How do I prevent the flux from "spitting" or spattering?
This low spattering flux is formulated for stability, but ensuring you heat the base metal broadly and avoid direct torch flame on the flux itself will further minimize spattering and maintain a clean workspace.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.