... , It can prevent to produce rust after cleaning.Directions1, To remove unstable rust scale and dirt through the soak system.2 ... .9, With water fush 1 to 2 times thoroughly to remove al remining.10, After injecting water, please put in Comstar ... the scale gone.2, Contains metal corrosion inhibitor.3, Strongly Remove Slime, Urine,mineral deposits&cement scale4, Super Concentrated5, Time saving Comstar ...