Magnets are usually imagined as rugged, hard chunks of metal or ceramics, but one of the most commonly used today is the flexible rubber magnet. The flexible rubber magnets, or bonded magnets or magnetic sheets, are made up of powdered magnetic materials mixed with a polymer binder, typically synthetic rubber or plastic.

The result is a rubbery, flexible magnet that can be stamped, printed, rolled, and molded to suit innumerable purposes. Less strong than rigid magnets like neodymium or ferrite ceramic, rubber magnets are superior in situations where flexibility, cost-effectiveness, and ease of design are more valuable than raw magnetic strength.