Chem TekUltraClear is a unique, naturally occurring attapulgite that has been thermally processed to provide hard, durable granules that wont swell or breakdown in the presence of water. They have a large highly active surface area. UltraClear effectively removes color bodies, surfactants, water, free fatty acids, organic oxides, and other polar contaminants from a wide range of oils, liquids, and waxes.