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Your cart is empty. When you're casting precious metals, there’s no room for error. Rosenthal’s Borax Flux is the trusted flux powder that serious jewelers rely on to ensure every melt flows clean and finishes smooth.
- Sourced for purity and performance
- Reduces oxidation and bubbling during heat
- Ideal for casting gold, silver, and sterling
- Packaged for pro-level use, resealable for freshness
- Backed by nearly a century of expertise
Whether you’re running a full shop or mastering your bench at home, Rosenthal gives you the confidence to cast with clarity.
Alexander black
Reviewed in the United States on January 14, 2025
Help my need melt brass .But not able comments itIt work great with it.
NickitOff
Reviewed in the United States on January 11, 2025
Works great for glazing melt dishes. I use when melting metals and I love it!
Flying Chef
Reviewed in the United States on June 23, 2024
What is there to say about a bag of borax ?
تركي
Reviewed in Saudi Arabia on March 4, 2024
المنتج سيء جدا جدا جدا
Jon
Reviewed in the United States on December 21, 2024
Perfect for jewelry making
Alexander Schump
Reviewed in the United States on December 12, 2024
There is definitely a noticible difference in quality between this and borax detergeant. However, for most applications borax works just fine. This works better for stubborn joints.
Michael Greco
Reviewed in the United States on November 2, 2024
Works how it's supposed to cleans garbage out of noble metals i like to use this first in the bottom of my ceramic crucables to help fill in any minor holes so metal does not stick inside.
Dude
Reviewed in the United States on August 13, 2023
No problems. Just wish Amazon was cheaper. 🤔
BAIGAN K ALBOAN
Reviewed in Saudi Arabia on March 20, 2023
كمية قليله جدا
J dog
Reviewed in the United States on April 25, 2023
Came fast but a lot smaller than expected course I didn't look at the amount so that's on me if u needing large amount click on the bigger option half pound defiantly is not enough
Anthony Boese
Reviewed in Canada on April 16, 2023
When working with metal this industrial grade Borax is pretty good, my only issue was when the bag came it was folded and taped which resulted in loosing half the product when opening because to my surprise the ziplock side was not the open close side the bottom of the bag was opened and not sealed
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