his coolant contains unique synergistic protection and anti-foaming agent with low freezing point and high boiling point, which can effectively inhibit the electrochemical reaction of various metal parts in the cooling system to resist the damage caused by high temperature, corrosion or rust to the engine cooling system, especially to strengthen the pitting protection of wet cylinder liner, suitable for heavy-duty trucks, large buses or various construction machinery vehicles, thus it is suitable for heavy-duty trucks, large buses or various construction machinery vehicles to achieve long-lasting cooling and keep the vehicle running under normal working conditions.