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I’m referring to the green stuff, I’ve never read that it doesn’t play well with aluminum UNLESS you don’t use the right water. People mix with regular tap water and that will potentially contain minerals that will damage the radiator. If in doubt don’t use concentrated coolant and get the pre...

A high quality 50/50 standard coolant mix has worked well for me with both aftermarket aluminum radiators and in marine applications that use a mix of aluminum and bronze cooling system parts. Make sure to use distilled water for the mix