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The Star brite 83900 is a 1-gallon marine descaling fluid concentrate designed for raw water-cooled systems. It removes scale, calcium deposits, corrosion, and salt buildup from marine engine cooling jackets, tubes, heat exchangers, and AC systems, restoring water flow without damaging seals, gaskets, rubber impellers, or hoses. This concentrated formula can be diluted at a 1:4 ratio with fresh water and applied via a recirculating system or allowed to soak for 4 to 8 hours, requiring ventilation during use.
