Fraunhofer, FST find fluoropolymer seals are “indispensable”

Weinheim, Germany – A new study by Fraunhofer Institute for Mechanics of Materials (IWM) has found that per- and polyfluoroalkyl substances (PFAS) are “indispensable” in industrial applications with harsh environments, particularly in the sealing industry.

Supported by materials experts at Freudenberg Sealing Technologies (FST), the study concluded that “a full replacement of PFAS in the sealing industry is currently unfeasible without facing significant losses in material properties, performance, and product longevity.”

Given the diversity of over 10,000 compounds, the study partners called for a “differentiated and fact-based discussion on regulating this class of substances,” said a release issued 19 Sept by the study team.

“Assessing the life-cycle of fluoropolymers, which are considered ‘polymers of low concern’, is a credible method for realistically evaluating potential risks to human health and the environment,” said Dr Raimund Jaeger, head of the tribology business unit at Fraunhofer IWM.

All stakeholders involved in the study agree that the safe production and disposal of polymeric PFAS was crucial, noted Jaeger, adding tha, “as long as precautions are taken to avoid harmful environmental impacts, the continued industrial use of fluoropolymers should remain possible.”

While, a definitive timeline for the introduction of a European PFAS regulation has yet to be established, industry is already bracing for potential changes which could lead to a blanket ban on over 10,000 PFAS compounds.

Fluoropolymers are currently facing intense scrutiny globally with a “reporting rule” taking effect in the US in 2026.

From 2026, US companies that have manufactured PFAS in the US or imported PFAS, or semi-finished or finished products containing PFAS between 2011 and 2022 will be subject to a reporting rule.

Individual states in the US are also starting to restrict the use of PFAS or require reporting, with the scope and schedules varying significantly state-to-state.

In Europe, the European Chemicals Agency (ECHA) is currently investigating a sweeping ban on PFAS.

According to FST, more than 4,400 stakeholders have provided over 5,600 comments and additional information for the ongoing investigation.

“We… are calling for a differentiated, risk-based approach to chemical regulation that is planned for PFAS,” concluded Dr Ruth Bieringer, VP technology & innovation, at FST.