Summer with 38 degrees after a few kilometers the liquid in the system turned and I saw a difference and the water temperature decreased

It reduces preheating time on cold days, meaning it reaches operating temperature a little faster.
It works with existing coolant, but also for those who use pure distilled water (racing).
It does not react in the circuit nor leave residue on the cap.
In the summer, it does not decrease the temperature, essentially it is suitable for countries with cold climates.