Handy B1 Flux lb9 - Lucas Milhaupt Handy Flux B-1 - 5 lb Jar

The Welder's Choice for Silver Brazing

When it comes to silver brazing, preparation is everything, and Lucas Milhaupt's Handy B-1 Flux is the trusted partner for welders and fabricators who demand perfect joints every time. This 5 lb jar offers a bulk solution for busy shops, ensuring you have plenty of the industry's most reliable flux on hand for every project. Whether you are repairing HVAC lines, fabricating custom plumbing, or working on automotive parts, Handy B-1 provides the cleaning power and protection needed to make silver solder flow like water.

One of the standout features of Handy B-1 Flux is its ability to act as a temperature guide. As you heat your base metal, the white paste transforms into a clear liquid at exactly 1100°F—the sweet spot for applying most silver brazing rods. This visual cue helps prevent overheating the part or applying the rod too early, reducing waste and ensuring a strong bond. The flux creates a protective shield that prevents oxidation from forming while you heat, and it aggressively cleans existing oxides from the metal surface, allowing the filler metal to wet out smoothly and penetrate deep into the joint.

This versatile paste works on almost any metal you'll encounter in the shop, including steel, stainless steel, copper, and brass. It stays where you put it, thanks to a tacky paste consistency that doesn't drip off pipes or vertical joints. Once the job is done, you won't need harsh chemicals to clean up; the residue washes away easily with warm water and a rag or wire brush. Upgrade your brazing game with the flux that professionals have relied on for decades.