Castrol Tribol Foodproof 1840 are food grade hydraulic oils with NSF-H1 approval, especially developed to meet the special requirements of the food and beverage industries. They are based on synthetic oils and contain carefully selected additives to prevent wear, oxidation and corrosion. Tribol Foodproof 1840 hydraulic oils comply with and even exceed DIN 51524 part 2 for HLP hydraulic oils.