​National is one of the world's largest and most experienced manufacturers of precision oil, grease, fluid and dirt sealing devices.  National produces millions of seals annually, in a wide variety of sizes and materials, for the OE, agricultural and industrial markets.

We offer standard and custom sealing products and systems that can withstand a wide range of operating conditions and fluid compositions.  By working closely with manufacturers from the concept and development through design, testing and production, National ensures maximum customer value.