Castrol Obeen UF are light, natural-colored special greases. They are physiologically safe and contain only components which are listed in the U.S. Code of Federal Regulations, Title 21, Section 178.3570 and 178.3620.CastrolObeen UF Series Greases are acceptable to the USDA as lubricants where incidental food contact may occur and are NSF H1 authorized. Castrol Obeen UF greases are especially suited for use in the food, beverage and pharmaceutical industries where there may be exposure of the lubricated part to the edible product or its packaging.