At Hydro Seals, we bridge the gap between standard industrial reliability and extreme-environment performance. Whether you need the versatile durability of FKM or the near-indestructible nature of FFKM, our engineering team ensures you get the right compound for your specific media. ### FKM Seals (Fluoroelastomer) Best For: Fuel systems, automotive engines, and general chemical processing. Temperature: Stable up to 200°C. Key Advantage: Excellent resistance to mineral oils, fuels, and many hydraulic fluids at a cost-effective price point. ### FFKM Seals (Perfluoroelastomer) Best For: Semiconductor fabrication, aerospace, and aggressive HPHT oil & gas. Temperature: Extreme stability up to 327°C. Key Advantage: The highest chemical resistance of any elastomer. FFKM is virtually inert, surviving where all other seals fail. Q: Can FKM be used in high-pressure steam? A: Generally, no. Standard FKM fails in steam. For steam applications, we recommend our specialized EPDM or Steam-Grade FFKM for temperatures above 150°C. Q: What color are FKM and FFKM seals? A: While color isn't a performance indicator, FKM is often black, brown, or green. FFKM is typically black or white (for semiconductor purity), but can be custom-colored for identification.