Well, it's either "waterless coolant" or "waterless car-wash" ie stuff you clean a car with that requires no water from bucket or hose.
I think it's the former....
^^^if you'd have read the whole link, you'd see that the freezing point of this coolant is minus 40C....so nothing else needs to be added for winter use.
There would be no point in adding antifreeze to something that's already got a freezing point below that of a water/antifreeze mix. (Scroll down to the two paragraphs starting with "The freezing point of water . . ." in O_G's link).
There's a bit of advertiser's licence in the advert in OG's link. Water boils at 100deg - more like 120deg when it's pressurised, as car systems are. Water + antifreeze goes down to -20 deg before freezing - my Volvo handbook says -35deg. On top of that I've never had any antifreeze added, or a change, in 10 years/180,000 miles on the current car (or the previous Volvo). To change to waterless, using the advert figures, would cost in the region of £200. I can't see the advantage.