Raybestos Element3 Coated Brake Rotors use an exclusive finishing technology. This technology can coat each rotor’s entire surface, including the cooling vanes. The Grey Fusion 4.0™ coating is a corrosion-resisting coat and significantly retards the rusting process. The Raybestos-coated rotor is best suited for drivers in rust-prone areas, such as coastal regions with high humidity and areas where aggressive snow and ice accelerate rotor corrosion.