ChemFlow 40 is a 'British-Standard antifreeze Coolant' composed of Mono Ethylene Glycol which uses Organic Acid Inhibitor Technology in combination with silicate and is free from nitrites, amines, phosphates, borates to obtain good protection of all hard metals in the cooling system and engine. ChemFlow 40 is neutral in relation to gaskets and hoses and has good resistance against foam. Chemflow 40 is an engine coolant concentrate (antifreeze) based on mono ethylene glycol, containing no nitrites, amines or phosphates (NAP free).