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Exclusive formula developed by Honda R&D.Specifically designed for use in aluminum engines.Uses high-tech organic corrosion inhibitors instead of more commonly used silicate corrosion inhibitors.Unlike silicates, HP Coolants organic corrosion inhibitors wont gel and cause radiator plugging.These inhibitors are also more stable for a longer shelf life and dont act as abrasives to mechanical water-pump seals, which may cause leaky seals