About Us

About us image

Century Seals is an ISO 9001:2015 certified manufacturing company located in Seaford, Delaware. We manufacture and supply high quality hermetic glass to metal seals in a wide range of configurations: kovar, TO packages, relays, headers, feedthroughs, and machined packaging. With over 100 years of combined experience in our management staff, we have the product knowledge and customer service advantage to best serve our customers.


Incorporated in 1999, Century Seals continues to supply its customers with the highest quality products to give them the advantage they need. Century Seals has established a reputation for excellent customer service. Honest pricing, good communication and respect for all business contacts have made us a preferred source in the microcircuit packaging industry. Plating finishes are provided by Fin-Tec, a metal finishing company, wholly owned by Century Seals.

Our Quality Policy:

Century Seals, Inc. is committed to achieving sustained, profitable growth by providing services which consistently satisfy the needs and expectations of its customers. Century Seals, Inc. is committed to comply with the requirements of ISO 9001, support its Strategic Direction and continually improve the effectiveness of our Quality Management System. This will be achieved through the following


Providing our customers with the highest quality products and services.

Providing those products and services on time.

Providing open communications with our customers and suppliers.

Providing a system of Continuous Quality Improvement

Providing our customers with the best value for our products and services.


What are glass to metal seals? Glad you asked, because not many people outside of the industry know. Simply put, a glass to metal seal is a piece of glass bonded to metal by firing it through a furnace. The vast majority of our seals have a metal pin intersecting the glass. After we sell our product, our customers will attach their electronics to one end of the pin. The electrical current is passed through the pin, but the electronic components are kept safe because the glass seal prevents any liquids or gases from passing through to potentially ruin the electronic components. Still have questions? Give us a call or Contact Us!