Since 1945, GLC has been processing calcium carbonate products at our dockside facility in Green Bay, Wisconsin. We've grown to become the leader in custom mineral processing for numerous markets such as glass, plastic fillers, coatings, adhesives and sealants, rubber, waste water treatment and fuel burning boilers.

We have designed flexibility into our process equipment that allows us to work closely with customers to produce the optimal product for them. Being locally owned helps us in making decisions in a timely manner and responding quickly to customers needs. The use of low-cost vessel transportation for our raw materials enables us to provide our products at a very competitive price.