Perfluoroelastomer (FFKM) seals certified FDA 21 CFR 177.2400 offer exceptional chemical resistance in extreme pharmaceutical manufacturing. They withstand concentrated acids, bases, and solvents at 300°C while maintaining purity. These seals appear in agitator shafts of bioreactors producing monoclonal antibodies where even trace contamination would compromise billion-dollar batches. https://globalsealstech.com/medical/