Besides elastomers, engineering plastics like Teflon and Nylon are sometimes used for components like wear rings and guide rings within sealing systems. Teflon offers low friction and high chemical resistance, making it excellent for rotating or reciprocating applications, while Nylon contributes additional strength and dimensional stability under load.​ https://globalsealstech.com/product-category/oil-gas-seals/oil-free-lubricated-pump-seals/