BOP ram seals for wireline use HNBR or FKM in shear/seal rams, cutting and sealing 0.125-inch cable at 10,000 psi. Cameron’s dual rams with anti-extrusion plates seal post-shear. In emergency kick control, these isolate well in https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/