Mayhems Blitz Complete is a highly effective full loop cleaning kit for water cooled computer systems and loops. Perfect for system prep, routine annual maintenance or coolant switch Tackles oxidation, surface rust and mineral scale deposits found inside new and used radiators Can improve the overall performance of your whole system Recommended for use with Mayhems Ultra Pure H2O Contains both Blitz Part 1 Radiator Cleaner and Blitz Part 2 System Cleaner. Mayhems Blitz Complete delivers both the incredible cleaning performance of Blitz Radiator, followed by the unmatched full loop cleaning potential of Blitz System in one kit for the ultimate custom loop preparation. Mayhems Blitz Complete kit is the most comprehensive cleaning kit ever released for water cooled computers. It has been developed to clean your radiators better than new and leave your system in perfect condition. The Mayhems Blitz range was designed, developed, and tested using Mayhems Ultra Pure H2O, as a result, we advise using Mayhems H2O for the diluting and flushing stages. Even though this is a cleaning solution it is not a long-term effective solution, never leave it in your system longer than 24 hours.