Woody Wax Engine Flush Refill 32oz. Protects and Lubricates Internal Cooling Systems from Salt Water Corrosion! This proven corrosion blocking product will keep the inside of your engine free from corrosion and your cooling system working like new. 70% of all saltwater engine failures are directly related to salt water corrosion and cooling system problems. Treat your engine once a month to remove scale and salt and to keep the internal cooling parts lubricated and working properly. EASY TO USE!