MRL 360 Coolant Temp 210+

I recently found a topic on an Audi-forum where someone tested a number of brands and PEAK came out WORST.
Far worst, as it didn't seem to provide any means of protection for the cooling system at all.
The test was with mixed / dissimilar metals in a cooling system, just like most people use like iron, aluminium and copper.

EDIT:
This is the topic;
Antifreeze Experiment & Testing