Ambient weather protection ranging between 36ºC for winter protection and +45ºC for summer. Suitable for use in petrol and diesel engines. Suitable for use in all petrol and diesel engines. Specification Based on coolant concentrate that conforms to BS 6580 2010. Danger Harmful if swallowed. May cause damage to kidneys through prolonged or repeated exposure if swallowed. Keep out of reach of children. Nitrate, Amine & phosphate free. Always read instructions.