Compounds that lower the surface tension of a liquid are called surfactants.
What makes you think that coolant doesn't have surfactants in it already? Again, great for straight water but nothing added that's not already in a coolant.
If these are such miracle products, don't you think coolant manufacturers would have incorporated them by now? I mean, we've gone from ethylene glycol to any number of a dozen different coolants over the past few decades. Surely if there's a chemical additive that can not only help engine warm up (this is an Amsoil claim for their version of the product) but also accelerate heat transfer at high temperatures, it'd had been included by now?