Castrol Optileb™ GR UF Range (Previously called Obeen™ UF ) - are light, natural-colored special greases. They are physiologically safe and contain only components which are NSF H1 registered and comply with b the U.S. Code of Federal Regulations, Title 21, Section 178.3570 and 178.3620 by the Food and Drug Administration (USA) as lubricants where incidental food contact may occur.The range of products under Optileb GR range are Kosher and Halal approved.