4 Seasons Antifreeze 50% Premix Is A Hight Quality Product Designed To Provide Year Round Engine Protection From Freezing And Corrosion High Quality 6 In 1 Protection With 50% Meg Anti Corrosion And Anti Scaling Inhibitor. Formulated To Meet The Requirements Of Modern Cooling Systems Of Passenger Cars; Commercial Vehicles; Agricultural And Off Highway Equipment. Manufactured And Complies With Sabs 1839 And Sabs 1251 Specifications. The Requirement Of Astm D 3306 Or Astm D 4985 Are Fully Met By The Coolant Heat Transfer Liquid. Phosphate; Nitrite And Nitrates Free. Protects All Cooling System Metals I.E.. Copper; Brass Aluminium; Cast Iron; Steel And Solder. Has No Effects On Hoses And Gaskets.