Flux Components for Melting and Refining Gold, Silver, Copper, Aluminum, Brass and more. (2024)

Anhydrous Borax
A multi-purpose flux that used to draw out impurities, keep your material liquefied for easy pouring, all while helping to clean your metals.

Boric Acid
Use this multi-purpose flux used to draw out impurities, prevent fire-scale, and deoxidize your materials.

Assay Dense Soda Ash
Assay Dense Soda Ash - a multi-purpose assaying flux used for gold recovery from black sands and bench grinds. Also can be used as a flux thinner.

Assay Silica 70 Mesh
Assay Silica - used as an ingredient of assaying flux (or flux thinner) for melting or smelting gold and other precious metals.

Assay Grade Fluorspar
Assay Fluorspar - used as an ingredient of assaying flux (or flux thinner) for melting or smelting gold and other precious metals.

Assay Silica Flour/Sand
This product consists of ground silica flour and sand, low in moisture with unmatched fineness and a consistency of its particle size.

Assay Potassium Carbonate
An ideal ingredient of assaying flux or flux thinner for melting and refining gold and other precious metals.

Manganese Dioxide
Maganese Dioxide is used as an assaying flux ingredient for melting or smelting gold and other precious metals. Used for gold recovery from black sands and bench grinds. Use on its own or in your own flux recipe.