Residual deposits are used mainly in ceramics, fillers in paper, rubber and paint, and as refractory products. Sedimentary deposits are used primarily for paper coating. The paper industry is by far the greatest consumer of kaolinite. Used as a paper filler, kaolinite fills voids between cellulose fibers, creating a smoother surface for a greater variety of printing applications. In rubber, kaolinite is used because of its reinforcing and stiffening properties.
Some examples are heels, soles, bicycle tire treads and flooring.
In ceramics, kaolinite provides desirable color and strength after firing. Kaolinite deposits in China are used primarily for ceramics. As a paint extender, it is used in both water and oil-based paints. It contributes to suspension and viscosity, as well as fills in voids to enhance opacity. Residual kaolinite is also used in adhesives, cosmetics and in tooth and auto polishing compounds.