Parker FFKM / Perfluoro in every industry, from aerospace and life sciences to semiconductor and oil & gas, choose O-rings made by Parker to keep their equipment running safely and reliably while extending seal performance and shelf-life. Our Parker ULTRA™ perfluorinated elastomers offer excellent compression set resistance and superior thermal stability/compatibility in a wide range of harsh chemistries. Parker ULTRA™ FFKM O-rings meet the challenges of tomorrow, making them the ideal sealing solution for critical applications that exceed the limits of other high performance elastomers.