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FAQ - Frequently Asked Questions

Does a magnet weaken over time?

Once in a while we are asked questions like "How long do magnets last?" or "Can magnets lose their power?". Under normal circumstances, neodymium and ferrite magnets, as well as magnetic tapes and sheets, retain their magnetism almost indefinitely. Factors such as temperature, vibrations or magnetic fields can however have a negative effect on the adhesive force of a magnet.
We have compiled the following list for the different types of magnets to show which factors can lead to loss of magnetism.

Neodymium magnets

  • Heat: Most neodymium magnets should not be exposed to temperatures exceeding 80 °C
  • Strong jolts due to repeated blows
  • 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
  • Strong jolts due to repeated blows
  • 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: Magnetic tapes and magnetic sheets cannot get hotter than 85 °C
  • Cold: Tapes and sheets cannot get colder than -20 °C
  • Strong jolts from repeated blows
  • 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.