BENTONE SD-2 rheological additive is an organic derivative of a bentonite clay. It is designed for use in moderate to high polarity systems containing solvents such a ketones, esters, glycol ethers and alcohols, including polar systems with some aromatic solvents. BENTONE-SD 2 is easy to incorporate and can be added dry to the pigment grinding process without requiring the use of a chemical activator or the preparation of a pregel. It may be used for post correction.