Stein Seal Czech s.r.o. is a subsidiary of Stein Seal Company (USA) Stein Seal Company is engaged in the design, development, testing and manufacturing of sophisticated mechanical shaft seals used in the aerospace, nuclear, chemical, petrochemical, and marine industries. Surpassing our customers' expectations by setting the highest standards for design proficiency and originality, constantly investigating new materials and processes, and refining our ability to manufacture to rigorous tolerances has made us the premier supplier of complex mechanical seal systems and specialty machined components.