Create Barrier Flux with Boric Acid and Alcohol

In this video, learn how to make your own barrier flux using boric acid and denatured alcohol.

Last edited: 4/21/2020
In this video from Rio Grande, Mark Nelson shows you how to mix boric acid and alcohol (use methyl or denatured) to create a barrier flux that help prevents firescale when soldering sterling silver.

View Related Articles by Topic

Soldering and Welding