Anti-freeze is important to your vehicle's cooling system not only during the winter months to stop your engine freezing solid but also in the warmer months to act as a summer coolant to ensure your Citroen Relay doesn't overheat. Modern antifreeze formula's contain excellent corosion inhibitors to ensure all internal components stay rust free. There are many different types of antifreeze listed on orangespanner. Please use our registration checker to find the correct antifreeze for your.