Star Brite Descaling Engine FlushDescaling engine flush is designed to safely and quickly remove scale, calcium deposits, corrosion, salt and carbon buildup in your engine's cooling and wet exhaust systems.• Removes scale and deposits from all marine engines• Will not damage engine seals, gaskets or rubber impellers.• Removes scale and deposits from all marine engines• Size: 1 Gallon (3.78 Ltr)