Oil seals are typically made from rubber or synthetic materials that offer resilience against wear and tear. Common materials include nitrile (NBR), fluorocarbon (FKM), and silicone, each chosen based on the specific application requirements. Nitrile rubber is widely used for its excellent resistance to oil and fuel, while fluorocarbon seals excel in high-temperature applications and chemical resistance. Understanding the materials used in constructing an oil seal is crucial for selecting the right type for any mechanical setup.