For all types of cooling and heating systems, including those with and without water filters. Radiators made of aluminium and plastic are also suitable. 150 mL is enough for up to 7 litres of coolant, while 250 mL is enough for up to 10 litres.On water-cooled engines, small leaks caused by stone chipping, porous soldered connections, or hairline cracks in the cooling system are difficult to locate; the only clue is a lower coolant level. This dispersion totally shuts these types of leaks right away, protecting the combustion chamber from coolant incursion damage. All common coolant additives and antifreezes are compatible. It can also be used as a preventative measure.