OEM Abration-Resistence NBR Molded Rubber Seal Parts Color Optional NBR Rubber Seal Parts are flexible rubber seals that are excellent in abrasion-resistence and oil and fuel resistence. They are specifically designed to protect the primary seal from contaminants. These seals are not designed to seal pressure differentials or to seal against fluid levels; they are primarily for contamination exclusion. The seal design utilizes centrifugal force to prevent intrusion of