Umicore Sealing

Reliable protection for technical precious metal surfaces

Umicore Sealing is a post-treatment process specially designed for technical precious metal surfaces. The result is a protective, transparent layer just a few nanometers thick. Depending on the application, this layer specifically prevents tarnishing, discoloration and corrosion.

In addition, the product quality is increased by appropriate properties. Umicore Sealing, for example, impresses with a significant reduction in the coefficient of friction, which results in a significant reduction in mating forces for plug contacts.

The technical layer properties, such as the contact resistance, are retained compared to an untreated surface. Subsequent processing (e.g. soldering) is also possible without hesitation.

All our protective coatings do not contain any environmentally harmful components such as solvents, CFCs, CHCs, hydrocarbons or chromium compounds. They are therefore biologically harmless.

Overview Umicore Protective Layers

All Umicore protective layers (technical and decorative) can be found on the overview page: Protective Layers for Precious Metal Surfaces


  • Wide range of products enables targeted protection for a variety of applications
  • Protects against corrosion, tarnishing, discoloration, dirt, abrasion and scratches
  • Reduces insertion and withdrawal forces
  • Electrochemical and electroless processes possible
  • Optimized for rack, barrel and reel-to-reel systems
  • Very short treatment times possible
  • Easy to use
  • Do not contain any environmentally harmful components such as solvents, CFCs, CHCs, hydrocarbons or chromium compounds
  • No influence on colour or gloss of the final layer


  • Plug connectors (also in the automotive sector)
  • Lead frames
  • Smart cards

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Questions about the product?

Markus Legeler

+49 7171 607 204

For inquiries and additional information
please contact

Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang

Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970

The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.