Rubber Precipitate Calcium Carbonate Powder is a fine white powder noted for its high whiteness and purity. It is used as reinforcing filler in the rubber industry such as a tyre/tubes, slipper soles, floor mats, and conveyor belts. It improves strength as well as whiteness. Rubbery products having a large amount of CaCO3 show improved strength and stiffness properties. It imparts stiffness to non-cured rubber products.