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Henkel’s Bonderite C-AK T308 (was P3-T 308) is a white powder, high-performance, high in phosphate, alkaline hot immersion soak cleaning compound, designed to cope with the toughest oil and grease contaminations. It also has excellent particulate removal properties. It is ideally suited for cleaning of steel and cast iron substrates as it does not contain free caustic alkali – it is also suitable for use with sensitive metals, however, preliminary testing is recommended to ensure that unacceptable staining does not occur. Bonderite C-AK T308 has excellent oil emulsifying properties and because of its high polymeric phosphate content it leaves no scale, even when used in the hardest waters. It is used as a soak and agitated immersion cleaner prior to hardening and after oil quenching. As it contains no silicates the danger of soft spots occurring during heat treatment (caused by silicates) is eliminated. It has no detrimental effect on furnace linings, and final rinses are unnecessary when working at concentrations of 0.3 per cent up to a maximum of 1.0 per cent. This solution is also suitable for cleaning and degreasing before phosphating, and a boiling solution of the product will give a clean bright surface to sheet steel, stainless steel and steel wire coated with stearates.