Reliable Hermetic Seals is a Beavercreek, Ohio-based LLC known for building custom hermetic seals around unusual customer requirements. Its engineering team supports prototypes through production orders for applications ranging from research laboratories to aerospace, while every seal receives visual, electrical, and leak inspection before shipment.
Sur-SealFounded in Cincinnati in 1965 as a family-owned business, Sur-Seal manufactures engineered components that solve sealing, insulation, thermal-management and protection challenges. Its custom-converting work ranges from precision gaskets to molded and extruded parts, supported by engineering services and a manufacturing network that now spans the United States, Mexico and China. Sur-Seal’s history includes making gaskets for the Apollo missions, while its combined operations now encompass more than 400,000 square feet and over 500 employees.CINCINNATI, OH
Seal Master CorporationFounded in 1974 by former B.F. Goodrich rubber-industry engineer Edward J. Bittle, Seal Master Corporation in Kent, Ohio, designs and manufactures custom fabric-reinforced inflatable seals and bags for demanding applications. Its fully molded, American-made products are engineered with customers for mission-critical environments, and the company says it has created more than 8,500 custom rubber products over nearly five decades. Every product is inspected at least twice and undergoes mandatory underwater leak testing before shipment.KENT, OH
Specialty Seal GroupIn business for more than 20 years, Specialty Seal Group is a Latrobe manufacturer known for building custom hermetic seals for demanding industrial environments. Its work supports specialized customers in fields such as aerospace and medical technology, with ISO 9001:2015 certification reflecting its quality systems. The company also received the Pennsylvania Governor’s Award for Environmental Excellence.LATROBE, PA
MicroCircuit Laboratories, LLCSince 2015, MicroCircuit Laboratories has built its reputation around hermetic microelectronic packaging for demanding photonics, quantum, aerospace, and other high-reliability applications. From its Kennett Square facility, the company develops and seals packages in a Class 10 cleanroom, supporting projects from early prototypes through production. Its patented Robotic Cover Sealer reflects MCL’s focus on bringing automation to a specialized packaging process.KENNETT SQUARE, PA