Century Seals is an ISO 9001:2015 manufacturer of the highest quality hermetic glass to metal seals. With over 100 years of combined experience, we have the knowledge to serve you best.

Our Products: Miniature hermetic feedthroughs, Relay headers, DIP headers, TO packages, Machined Kovar packages for microwave applications, custom parts to meet specifications, and many others. See the products tab for pictures.  

Product Applications: Aerospace, Defense, Industrial, RF Microwave, Semiconductors, Telecommunications, Refrigeration, and a wide variety of specialty manufacturers.


Have we let you down or not met your expectations? Let us know via this customer complaint form.

COVID-19 Company Response
Century Seals, Inc. offers our most sincere thanks to all individuals who are on the front lines fighting this pandemic. We currently supply many essential supply chains and have therefore remained op ... [READ MORE]
IMS 2020 Notice
Amidst the COVID-19 pandemic, the 2020 International Microwave Symposium that was to be held in Los Angeles has been canceled and moved to a virtual trade show in August. We look forward to participat ... [READ MORE]
We are Hiring! (Process Engineer)
May 2020 Edit: Thank you to everyone who applied. The position has been filled! Century Seals is looking for a Process Engineer. See the "Employment Opportunities" under the "Human Resources" tab t ... [READ MORE]
503 Harrington Street • P.O. Box 720 • Seaford, DE 19973 • (302) 629-0324 • Fax (302) 629-0325