I am sure to offend the WaterWetter users here, but I used that stuff about 20 years ago when it was sold as a powder and then in the liquid form. After a couple years of use, which was all year around with no antifreeze, I found that radiators started to seep and the leak?
After some testing and checking, we found that WW would quickly get corrosive and acidic, especially attacking the solder in the radiator.
Bottom line is WW does not contain enough additive to protect the system or has anything to control PH balance, but it will help heat transfer and lower temps with a surficant additive for better heat transfer, but like most antifreeze, it has a very minimal protective additives for the entire cooling system.
After using RMI-25 in copper and alum radiators some systems are still like new after 20 years of use and proper cooling maintaince.
The additive package in RMI-25 is unlike any other product on the market for cooling systems, and for as little as $10 year you can not only protect your cooling system, but also keep the internals clean and free from corrosion and rust. WW does not clean, RMI does!
We usually do not use antifreeze here in the desert with hardly any freezing temps, but it is also recommended to use RMI with antifreeze to provide additional additive protection, and with my customers in areas that do have low temps and need antifreeze, I advise them to dump it every spring and just run water and RMI during the other months.
As a side note, if a head gasket allows water into the oil even for a short period, it will react with and kill bearings quickly. Having changed MANY head gaskets on engines that had more water/RMI than oil, are still running fine with no bearing damage.
so I use Water wetter and water. Cools better and if you ever get a leak or push the head gaskets out your not sliding around in Glycol. A hi end classic car builder once told me he recommended it to all his customers because if a heater core ever got a leak it makes a real mess and this stuff clean up easily. I think Nick sells an even better product but it is not available up here. Hope this helps
