Harman Corporation has been a manufacturer and global supplier of dip molded flexible vinyl products for nearly 50 years. Starting with the pioneering formulations and process equipment developed by our founder Jack Harman in the late 1950’s and early 60’s, Harman Corporation has been manufacturing in Rochester, MI since 1963. The company’s produc ...t line includes plastic caps, grips and plugs; high temperature paint masks, custom dip molding and injection molding. A broad range of companies throughout the world finds value in Harman Corporation’s experience, outstanding customer service and extensive capabilities.