Fluoroelastomers normally abbreviated to FKM, but more commonly referred to as Viton. Rubber sheeting described as FKM is a highly fluorinated polymer. Typically used in resistance to high temperatures, chemicals, oils. Viton is a Trademark of Chemours.
MacLellan is a member of the Chemours Partnership programme and guarantees that all Viton Rubber Sheeting we supply is genuine Viton, see our blog on Using the Right Viton.