Hubercal Ground calcium carbonate 1317-65-3 Huber Engineered Materials Extenders / Fillers >> Calcium Carbonate, ground Extenders / Fillers >> Limestone Rubber - Elastomer (Chloroprene, Butyl …) ADHESIVE SEALANT Huber Engineered Materials offers a variety of minerals to suit the needs of the Joint Compound Industry. Huber’s Calcium Carbonate products offer consistent color, high brightness and fewer fine particles to help minimize cracking of your finished product. Calcium carbonate ranks on a volume basis second only to kaolin as the most widely used industrial mineral. The widespread use of ground calcium carbonate is due to a desirable combination of economic and physical characteristics such as availability, low cost, good color, low oil absorption and a wide range of particle sizes. Huber Engineered Materials creates superior calcium carbonate-based mineral solutions for use in the paint, paper, plastics, rubber, adhesives and wire and cable industries. Huber offers a very broad line of calcium carbonate (CaCO3) products differentiated by particle size and surface area. Ground limestone. Used as a filler in adhesives and in joint compound industry. Offers consistent color, high brightness and low oil absorption. Reduces cracking.