Are you referring to XF2Z-8548-AA (KM-4386)?
All in all, I think we would be better off not flushing and fooling with the radiator coolant so much. I know I'm not in the mainstream here ... but I don't have any system corrosion either! I have 250k miles on my vehicle ... and except for when a hose popped off at about 60k miles ... the coolant is still "original" mostly. I do believe in testing the coolant and keeping it rich in anti-freeze (-55 deg F) ... and occassionally dump in a pinch of baking soda to keep the acid at bay.
I admit the coolant is beginning to look pretty awful ... but still effective. I may break down and do a dump and refill this spring ... nothing fancy ... just want it to look prettier.