The reason why it shouldn't get contaminated with water, is that water would severely reduce the effectiveness of the coolant.
Water doesn't matter to the (mono)EG or PG in the coolant, but it will matter to your engine ...
Any water in there, would boil at the higher temps that the waterless coolant allows.
Combined with higher thermostat, water in the system is a recipe for disaster.
Dunno how they got it patented - probably based on one of the additives though in the US you can get just about anything patented these days, with total disregard for existing products - as waterless coolants / corrosion inhibitors have been around for quite a while.
I've made hundreds of tons of the stuff
