Hydrogen sulfide (H2S) resistant packer elements use specially formulated HNBR and FKM compounds tested per NORSOK M-710. These materials resist sour gas cracking and maintain mechanical properties in concentrations exceeding 30% H2S, making them essential for safe operations in Middle East, North Sea, and Canadian heavy-oil reservoirs with high sour content. https://globalsealstech.com/product/packer-element/