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Resin Coated Sands

Innovative Shell Resin and Resin Coated Sand Products

Custom Coat Resin Coated Sand

HA-International customizes each and every resin coated sand formulation so you can optimize your operation's unique capabilities.

Shell Process

The Shell Process is better than ever today as it remains the world’s predominant core-making process. HA-International is proud of its leadership position in the development of innovative shell resin and resin coated sand products.


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Advantages of the Shell Process

In today's environmentally conscious world, the Shell Process provides workers with numerous operating advantages:

  • Shell Process products contain low or no formaldehyde.
  • Shell Process molds and cores remain usable indefinitely and are unaffected by high humidity storage.
  • Shell cores can be made hollow, resulting in significantly lighter weight and lower-cost cores.
  • Hollow cores and lightweight shell molds burn more completely and yield waste sands that contain less organics.
  • High-strength cores and molds yield castings with precise dimensional tolerances.

Evolution of Foundry Shell Sand for Today's Foundry

Simple Solutions That Work - (Issue 9, September 2018)

The Shell Sand process, or the "Croning" process, was invented by Dr. Johannes Croning in Hamburg, Germany, in 1944. This process is the oldest core and mold-making technology that utilizes synthetic resins. Although many additional sand core and molding-making technologies have since been introduced, the Shell Sand process is still a very effective core and molding process today.

Troubleshooting the Shell Process

Operating problems can occasionally crop up, even in the most carefully supervised shell process operations. When they do, quick corrective action can make the difference between a minor inconvenience and a serious dollar expense to the foundry.

Our troubleshooting poster draws on the experience of HAI’s field and laboratory personnel to summarize some of the more common shell process operating problems with suggested solutions that have been successfully used in foundries.

Safe Handling of Super Sacks

At HAI, we are committed to providing information to our customers regarding the safe and environmentally responsible use and handling of our products and containers.

Please view the FIBC safe handling guide and our new velcro release super sack instructions for our Super Sack flexible bulk containers.

Shell Process History

The Shell Process, also known as the Croning Process, was developed by Johannes Croning in 1944 in Hamburg, Germany. For more information, read about the history of Johannes Croning and his impact on the American Foundry Industry.

For additional product information, contact Samuel Christensen at