Ferrite, Samarium Cobalt and AlNiCo magnets are usually uncoated because they do not rust/oxidise. Neodymium magnets are available uncoated but this is not common.

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Home › Magnetic Products › Holding and Anchoring Magnets › Guy's Magnets Pot Magnets › Uncoated
Home › Magnetic Products › Holding and Anchoring Magnets › Guy's Magnets Pot Magnets › Uncoated

Ferrite, Samarium Cobalt and AlNiCo magnets are usually uncoated because they do not rust/oxidise. Neodymium magnets are available uncoated but this is not common.
