GULF Coolant 40 is based on mono-ethylene-glycol and the multi-functional additive package. It ensures good protection of all types of metals used in cooling systems and engines, is neutral to the materials of seals and hoses, has excellent anti-foaming properties. Application. GULF Coolant 40 is used in cooling systems of gasoline and diesel engines of modern cars. Color: blue. Concentration: ready-to-use. Classification: ASTM D 3306 , SAE J1034. Specifications: AFNOR R15-601, BS 6580, CUNA NC956-16.