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Henkel’s Bonderite O-PC 528 BLACK (was Suncorite 528RFU) is a high performance, chromate free, self phosphating, protective treatment and coating for metal of any surface profile. It has outstanding resistance to corrosion, such as salt spray and humidity, battery acids, fuel oils, solvents and brake fluids. Henkel Bonderite O-PC 528 BLACK RFU is the “ready for use” formulation of this all in one process, providing a coating with outstanding adhesion and corrosion resistance due to its special blend of anti-corrosive pigments. It can be easily spray applied without complete pretreatment or energy consuming baking processes. Automotive component manufacturers are using Bonderite O-PC 528 BLACK RFU for the coating of engine mountings, springs, brake components, metal pressing and almost all underbody components. A single 35 micron coating will provide 240 hours ASTM B117 hot salt spray resistance on suitably cleaned mild steel panels, meeting some of the strictest automotive specifications laid down. Work to be treated with Bonderite O-PC 528 BLACK RFU should be free of scale, rust, grease or oil. The coating touch dries at room temperature in around 40 minutes – force drying will accelerate the through hardening.