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The platinum catalyst in silicone sealants is a major cost element. This should be a major boone for Dow-Corning and its owners. Also Wacker. (Most other players--General Electric, Rhodia--have sold that business.)

You wonder what other uses of platinum can be replaced with abundant iron. Platinum is also a catalyst often used for hydrogenation (although Raney nickel is cheaper) as in hydrogenated or partially hydrogenated fats and oils.
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