'The addition of Radiator Relief to your coolant system will reduce operating temperatures by as much as 30°F. 2) Radiator Relief will also provide a 50% quicker warm-up time to operating temperature'
Clever stuff that!
When it wants to it absorbs lots of heat and makes your engine run 30F cooler, yet on the other hand, it will alter all known physics and not absorb heat so your engine heats up 50% quicker!
You can't add anything to water to make raise its specific heat capacity (ability to absorb heat) apart from Ammonia or Hydrogen.
All these 'water wetter's do is break down the surface tension so any air trapped in the water is released, so in theory, its more 'dense' and has a greater 'surface area'.