Profile: Seybert Castings specializes in the production of functional prototype and short-run castings & moldings. We manufacture prototype zinc alloy & aluminum alloy castings. We also manufacture low volume rubber moldings. We cast in a variety of technical grade zinc alloys. We utilizes a custom investment casting process. It is well suited for small, intricate zinc and aluminum alloy castings, as well as medium sized parts. Ideal quantities range from 1 to thousands of parts.