I put it in a 25-year-old Seicento, it had leaks from everywhere and some they couldn't find, and the mechanic hasn't lost any coolant for a week now, I don't know how long it will last and how often I can reapply it

It worked on a small leak from the water cooler and head in a Citroën C2!!! Everything is fine, no problems with the other cooling systems of the car (radiator, heater)

First of all, let me say that I installed it and the mechanic noticed some drops on the sides of the refrigerator. No problem so far, the coolant level doesn't decrease and it seems to hold a little more pressure (probably because it sealed the leaks and the circuit doesn't take in air) because I see the temperature struggling to reach 91-92 'C while it used to reach 95 'C. We will see over time, that's why I didn't give it 5 stars.