I need to change the coolant in my vehicle to which Radiator Stop Leak was added. Will the stop leakage action be maintained or do I need to add another one to prevent the leakage from reappearing?

The Radiator Stop Leak is composed of plant fibres that position themselves withinin the holes to plug them. They will drain off with the coolant when draining. It is therefore necessary to replace the Radiator Stop Leak when replacing the coolant to prevent the leaks from reappearing.