Chemicals called per-and polyfluoroalkyl substances (PFAS) are a class of chemicals that some are recommending should be banned from use in the United States and the European Union. Some information seen in the media can be hyperbolic. While some chemicals classified as PFAS are an environmental concern, many are considered safe materials. The Fluid Sealing Association (FSA) is actively trying to communicate concrete, fact-based knowledge about this subject to counter arguments with a focus on one of these chemicals—polytetrafluoroethylene or PTFE.