Longterm Antifreeze AG11 is a concentrate used in all seasons in any modern aluminum and copper cooling systems which require ethylene-glycol based anti-freezes. It protects from corrosion and scale. It does not foam, it is neutral to gaskets and hoses. It provides enough anti-corrosive properties already at the concentration from 20%. It is a low-silicate fluid. It is free of phosphates and nitrates. Service life: 3 years. Approvals and specifications: ASTM D3306/D4340/D4985; SAE J1034; NATO S759; VAG TL 774 C