“Sequel Equal” Manufactured from pure PTFE yarns with high thermal conductivity. 155 complies with the FDA and USDA requirements under Title 21 Food and Drugs, 178.2570, Lubricants with Incidental food Contact, 177.1550, Perfluorocarbon Resins. 155 contains only materials permitted for food contact use by U.S. Department of Agriculture and the Food and Drug Administration.