What is NSF Category Code H1 – Lubricants with “Incidental Contact”?NSF H1 products are acceptable for use as lubricants with incidental food contact for use in and around food processing areas. Such compounds may be used on food processing equipment as a protective anti-rust film, as a release agent on gaskets or seals of tank closures, and as a lubricant for machine parts and equipment in locations in which there is a potential exposure of the lubricated part to food. These lubricants are considered ‘food-grade’.