Different materials serve different purposes in the world of sealing washers. Rubber sealing washers are flexible and chemical-resistant—great for plumbing. Neoprene and EPDM are common in household plumbing due to their tolerance for hot and cold water. Silicone sealing washers excel in high-heat automotive environments, while metal washers with rubber linings combine strength with sealing flexibility.
Each washer material has its advantages. For example, viton sealing washers for fuel systems offer superior chemical resistance, while copper sealing washers provide a crushable, leak-proof fit for oil drain plugs.