H2S, CO2, elemental sulfur, and methanol in upstream environments. They eliminate swelling, blistering, and embrittlement in downhole tools, wellheads, and valves. Singapore offshore operators trust these robust FFKM O-rings for critical barrier sealing in high-pressure, high-H2S wells, ensuring long-term integrity and regulatory compliance. https://globalsealstech.com/ffkm-seals/