FKM (Viton) fortifies Downhole Seal Stacks against hydrocarbons and amines at 200°C, with low compression set for repeated energization. Dipolymer grades resist steam in SAGD ops. In chevron designs, it pairs with PEEK backups for 15,000 PSI integrity. NORSOK M-710 approval ensures RGD safety. Limitations: poor low-temp flexibility below -20°C, addressed by terpolymers. Gulf of Mexico... https://globalsealstech.com/media/