Also- if you're worried about compatibility, look at the MSDS sheets for both your standard coolant, and the one you're looking at buying. It won't list the proportions of ingredients, but it'll still list them, so you can make sure it's more or less the same thing. Most water-based coolants are fairly samey-samey, for what it's worth. Also compare the viscosities, if you can find the data on that, if you don't match that it could gum up the pump or otherwise not perform as intended, especially if your mill doesn't give you a ton of control over coolant jet placement. The VHF S5 we have gives you exactly zero control over the coolant placement or pressure, so I know you'd need a good product match in that regard.
My last (non-dental) CNC shop used a lot of Rustlick, the economy-grade stuff, but we were doing lighter-duty steel and aluminium, not heavy production work on tough alloys.