ECS GEOMET® premium brake rotors start with quality materials and precision machining. That would be enough for most of us, but it is only the beginning. To prevent rust pitting and corrosion damage, ECS GEOMET® rotors are sprayed in a special water-based solution, then heated to cure the coating and remove all oil residue remaining from the manufacturing process. These added steps create a durable, lasting rotor surface that resists road salt, solvents, and other corrosives. To prevent brake pad deposits and reduce fade, select a drilled and slotted ECS GEOMET® rotor. Crossed-drilling dissipates heat faster for better braking and reduced fade. Slotting cleans the pads by moving water, gases, and contaminants away from the pad/rotor contact surface to further enhance braking performance. GEOMET® is a proprietary water-based coating that contains metal oxides, metallic zinc, and aluminum flakes. More environmentally friendly than other treatments containing toxic metals, GEOMET® coating contains no nickel, cadmium, barium, or mercury."