High temperature capability distinguishes HPHT seals from standard oilfield elastomers that harden, crack, or lose sealing force above 250°F. RGD resistant HNBR formulations maintain properties to 350°F in continuous service. Advanced FKM compounds extend capability to 400°F. FFKM materials enable 500°F to 600°F operation in extreme geothermal and ultra-deep wells. High temperature ag... https://globalsealstech.com/product/rgd-rapid-gas-decompression-o-rings/