Typically made from elastomeric materials like nitrile rubber (NBR), fluorocarbon rubber (FKM), or silicone, oil seals are engineered to withstand varying temperatures, pressures, and chemical environments. The choice of material affects their performance characteristics, including resistance to wear, deformation, and aging. The design of the oil seal includes a sealing lip, which provides a barrier against leaks while maintaining a low coefficient of friction against the shaft.