Excelsior is a custom manufacturer of gaskets, washers, seals, o-rings, insulators, packings, shims, covers and other precision parts from both synthetic materials and metals. Quality is a daily priority at Excelsior. We are AS9100C; ISO 9001:2008 registered and take part in rigorous quality inspections and measurement reporting to make sure our products are up to the high standards weve set for ourselves. Delivering more than just a quality product, we exceed the expectations and needs of our customers through collaboration, expanded service offerings, technical expertise, and prototyping to deliver high quality solutions. Whether it is a standard part for a household consumer product or proprietary piece for an aerospace company, our team will work with you to design, prototype and manufacture parts that meet the exact specifications of your project. Common non-metallic materials include plastic, rubber, rubber compounds, foam, cork, sponge, felt, various fiber blends and many other types of material. Our metal manufacturing capabilities includes aluminum, copper and light gauge steel.