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FAQ - Frequently Asked Questions

Does a magnet weaken over time?

Under normal circumstances, neodymium and ferrite magnets as well as magnetic tapes and sheets keep their magnetism practically indefinitely.
The following influences can lead to loss of magnetism:

Neodymium magnets

  • Heat: Most of the neodymium magnets should not be exposed to temperatures above 80 ░C
  • Other strong magnetic fields (e.g. of electromagnets)

Ferrite magnets

  • Heat: Ferrite magnets shouldn't be exposed to temperatures above 250 ░C
  • Cold: Ferrite magnets shouldn't be cooled down below -40 ░C
  • Other strong magnetic fields: Fields of electromagnets, but also neodymium magnets can demagnetise or reverse the polarity of ferrite magnets. Therefore, neodymium and ferrite magnets should always be stored and transported separately.

Magnetic tapes and magnetic sheets

  • Heat: Tapes and sheets shouldn't be exposed to temperatures above 85 ░C
  • Cold: Tapes and sheets shouldn't be cooled down below -20 ░C
  • Other strong magnetic fields: Fields of electromagnets, but also neodymium and ferrite magnets can demagnetise or reverse the polarity of magnetic tapes and sheets. Therefore, they should always be stored and transported separately from other magnets.