GordnadoCRD wrote:
My exposure to Water Wetter is limited, but IIRC it is intended to be used only with water, and generally short term, such as racing applications where antifreeze inhibits the cooling capacity of high thermal output, relatively low duration (racing) engines, and as such, are frequently torn down and rebuilt. Again, IIRC, it has little to no corrosion inhibitors (for alumin(i)um, iron, or brass) or component lubricators (needed for your water pump).
If I am wrong, or if things have change since my last involvement in such things, please correct me.
Water is a much better coolant than coolant is but the surface tension reduces its ability to pull the heat off the wall of the passages and give off heat to the radiator. Water wetter is most effective when used with distilled water because its basically a soap which breaks up the surface tension of the water, allowing it to make better contact with the metals(the engine and radiator) and remove heat. The coolant already has a lower surface tension so water wetter is less effective, but it does still make a small difference.
As far as additives go, the Redline Diesel Water Wetter does not have any anti-corrosive specifically because it is intended to be used in an engine that has corrosion inhibitors already. The normal Water Wetter does have inhibitors so it can be used with distilled water.