Gulf Euro Cool is a very high quality antifreeze/coolant concentrate for year-round use. It is suitable for both gasoline and diesel engines with iron, aluminum or iron with aluminum cylinder heads. Formulated from ethylene glycol and special inhibitors, it gives outstanding rust and corrosion inhibition to all cooling system materials and is fully compatible with flexible hoses and seals etc. Gulf Eurocool is free from borate, silicate, nitrate phosphate and amines.