Coolant SP 12 is a purple-coloured, ready-to-use coolant for cooling systems made of aluminium and copper or aluminium alloys. Coolant SP 12 can be used safely in conventional cast iron cooling systems. By using powerful corrosion inhibitors, Coolant SP 12 is practically unaffected by ageing, giving it a much longer service life than conventional coolants. Optimal results can only be achieved with 100% filling.