Epoxy resin coated neodymium magnets are known as epoxy coated neodymium magnets or neodymium magnets with epoxy coating.Epoxy resin coating is excellent against humidity and salt spray.There are three types of epoxy coating, Epoxy coating, Ni+Cu+Epoxy coating, and Zinc+Epoxy. Epoxy resin coated square neodymium magnets blocks from Meank Magnetics are always made with three layers.The common color of epoxy resin coated square neodymium magnets blocks are black and grey.