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A Tradition of Technical and Manufacturing Excellence: Thermoseal Inc. is a leading manufacturer of fluid sealing materials for industrial and manufacturing applications. Based in Sidney, Ohio, Thermoseal is the exclusive licensee in North America of the Group of Independent Klinger Companies, a world-renowned developer, manufacturer and distributor of fluid sealing and control products, founded in 1886 by Austrian engineer Richard Klinger.

From the revolutionary development of the compressed fiber gasket in 1894 to today’s advanced sealing material technology, Thermoseal continues the long-standing tradition of quality and innovation by providing a wide variety of sealing products – ranging from a complete line of compressed fiber sheet to flexible graphite and PTFE gasket materials.

Through ongoing research, development, service, and global support, Thermoseal is committed to technical excellence in every product, for every customer, every day.