Total’s GF-150 grade (modified FFKM) set the benchmark for HPHT/RGD resistance, surviving 204°C, 35% H2S, and 100+ decompression cycles. Similar next-generation compounds now reach 260°C continuous with retained sealing force after 5-year simulated aging. These represent the current ceiling for elastomeric HPHT sealing performance. https://globalsealstech.com/oil-gas-seals/