Sealing copper and the possibilities

Copper is a robust metal, but it oxidizes in the air and in connection with acid, which can be transferred to the metal surface through sweat, for example. To prevent this, you can also seal the copper.

Without a seal, copper will tarnish over time

Over time, the copper forms a protective layer that prevents further oxidation of the surface. Nevertheless, this protective layer bothers many people who prefer to keep the material shiny. You can also seal the copper, but you must first clean it thoroughly, for example with a simple polish or with commercially available toothpaste, which is applied with a damp cloth until the material shines again. Incidentally, various metals can be brought back to a high gloss in this way, for example silver, gold or brass.

  • Also read - pouring copper
  • Also read - copper grinding
  • Also Read - Brazing Copper

How a seal can be made and what its advantages are

In principle, a seal can be made with normal clear lacquer. In front of the seal, however, the copper must be thoroughly cleaned and the patina created over time are thoroughly removed. This is also necessary to ensure sufficient adhesion of sealing on the metal, which offers some advantages:

  • The copper remains shiny over many years
  • The metal surface is protected from external influences
  • There are no unwanted discoloration of the metal
  • The surface can be kept very well clean or. clean

How to apply the seal

After a thorough cleaning and removal of the oxidation layer, you can apply the seal in the form of clearcoat or other methods. This can be done, for example, using a roll or a brush. Alternatively, you can also buy a spray can with clearcoat to paint the metal.

When the copper surface is very dirty or oxidized

In general, copper can be processed very well. You can sand it down without any problems, for example if there is a very strong oxidation layer or a surface patina needs to be removed as much as possible. This can be done, for example, with a grinding machine that has been equipped with a grinding wheel with medium grain. In this way, the copper surface can be sanded smooth and shiny, in order to then apply the seal in the form of clear varnish.