Anti-freeze and coolant are the same. It actually provides help both ways - lowers freezing point so the car can remain in cool environments longer and the water in the cooling system won't freeze, as well as increase the boiling point as I mentioned earlier, while still providing anti-corrosive properties.
*Some* coolants do not have the anti-corrosive properties, because some coolants are the generic type - they have the basic necessities of what you need but lack the more important stuff - hence the lower price commonly found on these. That's why it's best to purchase the correct OE coolant for your vehicle because chances are they have the best ingredients specifically made for your car.
Just be careful in handling anti-freeze because it's toxic, and has been said to smell sweet so animals will likely be lured to its smell and possibly drink it. As always when doing repairs be careful, also when opening the radiator cap on a hot engine always use a rag and open at the first detent, to release the pressure, then once it's free open it all the way.
Also make sure your radiator cap is in good working order. If not sure, replace na lang since it's relatively cheap. Find out first what rating it has (usually it's in bar, 1.1, 1.3, etc) so get a cap that's either the same rating, or higher. If the upper radiator hose looks like it's been sucked in by its own self, and coolant loss is observed, then it's a bad radiator cap.
Hope that helps...




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anyway 100kms too early to determine...........