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Everything You Might be Interested in About Rubber-coated Ndfeb Magnets

April 17,2023

Ndfeb magnets because of poor corrosion resistance, so usually need surface coating treatment before use. If you are using a magnet for an activity that may expose it to moisture, it is best to add a coating to your magnet or it may suffer corrosion. Corrosion destroys the magnetic field of the magnet, so coating the magnet is necessary.


Ndfeb magnets have different types of magnet coating, some of the mainstream coating is nickel - copper - nickel, zinc, epoxy, gold, rubber and so on. Each type of coating has its unique characteristics.

We hope you found this article series helpful.


What is a rubber-coated magnet?

The protective rubber coating protects fragile magnet, also known asRubber-coated magnets. A common magnet is coated with black isoprene rubber. They are among the most widely used magnets in various industries. Rubber-coated magnets are known to be very durable and provide excellent friction and protection.

They are perfect for outdoor and indoor use. Due to their high slip resistance, this type of magnet is commonly used for fixing and mounting applications.

2.Type of Rubber coated magnet:

Rubber-coated magnets come in different designs, such as external, internal, countersunk and threaded.

● 1.External thread


● 2.Convex thread


● 3.Flat thread


● 4.Counterbore hole


3.Advantages of Rubber coated magnet:

● 1.Strong corrosion resistance

The rubber material itself is resistant to corrosion, and generally the rubber coating will be much thicker than other types of neodymium magnet coating. This also makes the coating suitable for use in wet environments, thus protecting the powerful magnets inside.


● 2.High slip resistance

Rubber has a high friction, ordinary coating on a smooth surface adsorption, easy to slip, but rubber coating will not.

● 3.Good temperature characteristic

Rubber-coated magnets work well at temperatures ranging from 80 degrees Celsius to 40 degrees below zero.

● 4.Variety of colors

The most common is black, but it can also be adjusted to blue, yellow, green, and other colors according to the need.


In summary, the rubber coating is suitable for the use of harsh environment, but the general size is not conventional, may need to open the mold, this situation is best to communicate with the magnet manufacturer in advance.