Since 1916, Excelsior has been a trusted manufacturer of custom gaskets, washers, seals, insulators, packings, shims, protective covers, and other precision-engineered components produced from synthetic materials and thin-gauge metals. With more than a century of manufacturing experience, the company has built a reputation for quality, reliability, and technical expertise across a wide range of industries. Based in Rockford, Illinois, Excelsior combines the advanced capabilities required to support large international OEM manufacturers with the personalized service and responsiveness valued by businesses of all sizes. From standard components for consumer products to highly specialized parts for aerospace and other demanding industries, the company works closely with customers to design, prototype, and manufacture solutions that meet exact project specifications. Through a commitment to precision manufacturing, innovation, and customer collaboration, Excelsior continues to deliver dependable custom-engineered products tailored to complex application requirements.