Calcium Carbonate 819 Calcium carbonate 1317-65-3 Whittaker Extenders / Fillers >> Limestone Rubber - Elastomer (Chloroprene, Butyl …) ADHESIVE SEALANT Calcium Carbonate - Technical Grade (Ground Limestone - Surface Treated) Surface treated ground limestone products are widely used as filler and extender pigments in industrial applications where ease of dispersion is desired. Coatings - Fine ground limestone is used as a filler and titanium dioxide extender in a wide variety of paints, coatings and printing inks. Rubber and Plastics - Ground limestone is a low cost reinforcing agent and filler for rubber and plastic compounds. The presence of ground limestone improves many of the physical properties of rubber and plastic compounds. Adhesives and Sealants - Ground limestone is widely used as a filler in joint compounds, wall tile adhesives, caulking compounds, sealants, etc. Other - Ground limestone is also used as a mild abrasive in household cleansers, as a carrier for agriculture products, as a dusting agent, etc. Low-cost fillers, increased opacity. Surface treated, ground limestone. Used as a filler in wall tile adhesives, joint and caulking compounds and sealants. Offers increased opacity.