Celebrating its 50th anniversary in 2026, Seal Dynamics is a HEICO company founded in 1976 that grew from a specialized seal supplier into a global aerospace partner. Based in Hauppauge, New York, it is known for combining technical product knowledge with logistics support for commercial and military aviation customers, including round-the-clock assistance when aircraft are grounded. Its distribution quality system is certified to AS9120 standards.
AS9120
FAA AC 00-56A Accreditation
Compliance program
NSF/ANSI 61 Certificate of Compliance
ISO/TS 16949:2009
Aviation Suppliers Association Membership
Registration
IATF16949
Quality certification
Stein Seal CompanySince 1955, Stein Seal Company has designed and manufactured custom seals and precision components for demanding aerospace, nuclear, marine and industrial equipment. The privately owned company has grown from five employees in rented space to more than 200 employees and over 100,000 square feet at its specialized manufacturing facility, with engineering, repair and dynamic testing capabilities under one roof. Its Pennsylvania operation holds ISO 9001:2015 and AS9100D certifications, along with NADCAP approvals and FAA and EASA repair-station certifications.336412KULPSVILLE, PA
C.E. Conover & Co. IncSince 1947, C.E. Conover & Co. has manufactured sealing systems for aircraft and spacecraft, growing from an aerospace supplier into a U.S.-based producer of engineered seals and molded and machined polymer parts. Its Bensalem operation is known for developing proprietary REVONOC materials and for supplying sealing components used in applications ranging from the Grumman lunar module to water treatment and pharmaceutical production. Conover is registered to AS9100D and ISO 9001:2015.339991BENSALEM, PA
Sealing DevicesSealing Devices grew from Terry Galanis Sr.’s $157 home-based venture in Alden, New York, into a third-generation family-owned company serving critical applications. Founded in 1963, the Lancaster-based manufacturer supports customers with custom sealing work and related engineering guidance, while maintaining a 225,000-plus-square-foot manufacturing footprint and serving all 50 states and more than 20 countries. Its quality systems have been certified to ISO 9001:2015 and AS9100D.LANCASTER, NY
DBR Industries, IncDBR Industries has specialized in seal distribution and sealing problem resolution since 1969, serving as a blue chip supplier to the U.S. Department of Defense and various industrial markets. The company provides certified quality seals, engineering support, and value-added services.NEWTOWN, PA