Rislone One 473 ml package is used per 15 L of coolant. Let the engine cool. Drain the cooling system. Close the drain port. Pour the additive according to dosing ations and refill the system with water. Reattach the cap. Start the engine and let it run for 10-15 minutes at idle with the heating set to maximum. Let the engine cool. Rinse the cooling system and reservoir until the water is clear. If necessary, perform another flush. Close the drain port. Fill the cooling system and reservoir with the coolant/water mixture ed by the manufacturer. Car Maintenance Set