Flux is formulated from different blends of salts to clean molten aluminum of impurities and oxides. They can be applied by broadcasting it onto the molten bath and manually stirring through the aluminum bath with a scraper or skimmer. It can also be injected (the preferred way) deep into the melt. Either way, it grabs the impurities and floats them to the surface as dry dross ash. Skimmers or surface scrapers then remove the ash. Care should be taken to remove as little raw metallic as possible. Flux is formulated to specific alloys and holding temperatures.

Chemical fluxes for aluminum have a number of functions:

  • Covering fluxes which form a molten layer to protect the melt from oxidation and hydrogen pick-up.
  • Drossing-off fluxes coagulate the oxides allowing easy removal from the surface of the melt.
  • Cleaning fluxes remove non-metallics from the melt by trapping the oxide particles as they float out.
  • Fluxes modify the alloy, by introducing sodium, improving its microstructure.
  • Exothermic fluxes ensure that aluminum liquid trapped in the dross layer is returned to the melt.
  • Fluxes for reclaiming swarf, skimming, and turnings, giving a high metal yield.
  • Fluxes for the removal of oxide build-up from furnace walls.

Foundry Products

We supply the necessary foundry products you need to make a quality casting. Whether you need Metals & Alloys, Melting & Melt Quality, Molding & Core Making, Casting & Shakeout, Finishing & Surface Preparation, or Environmental Compliance products, we have what you need.

Metals & Alloys

Alloys for Aluminum, Brass, Bronze, Gray & Ductile Iron, and Steel castings. 

Melting & Melt Quality

Everything you need to produce molten metal.

Molding & Core Making

Additives, risers, chaplets, chills, bentonite, resin systems, and coatings you need to make a quality casting. 

Casting & Shakeout

Products to aid you in casting and shakeout.

Finishing & Surface Preparation

Abrasives, carbide burrs, grinding and cutting wheels you need to process castings


PPE, dust control, baghouse, and waste management products to keep you in compliance. 

About Us

Carpenter Brothers, Inc. is the leading supplier of equipment, consumables, and technical expertise for the metal casting industry. Founded in 1917, by Everett and Milton Carpenter, the brothers were able to use their unique foundry experiences to solve the problem of the day: a reliable sand source.  They got their foot in the door by selling natural bonded molding sand, which was mined by hand, loaded into horse-drawn carts, and then delivered to customers.  Not only did they sell the sand, but their technical expertise was readily available for all customers, big or small, to help manufacture the best castings. After surviving The Great Depression, Carpenter Brothers, Inc. slowly increased the number of products it distributed and expanded its sales territory into what it is today.


Carpenter Brothers, Inc. has committed itself to its customer's success by providing exceptional service to go along with the superior products and equipment they supply.  With multiple warehouses around the United States we can get you the products you need when you need them. Our logistics team can handle getting your order to you by truck, plane, or train. Our technical sales and engineering staff all have experience in the industry, so when you buy from Carpenter Brothers you gain access to all of our knowledge.

Contact Us for a Quote

We are here to assist, give us a call or send us an email with your questions or quote request and we will be happy to help.