Does Zerex G-05 only come premixed?

I've bought it in full strength at NAPA. The other places like O'Reilly, advance, and auto zone only seem to carry premix.
I’ll try Napa. Here in Canada, we’re not blessed with the availability that the US has. Amazon has it for $38 CAN - about $25 US sound reasonable? Whatever I’ll buy it, but will shop around- thanks again!
 
I’ll try Napa. Here in Canada, we’re not blessed with the availability that the US has. Amazon has it for $38 CAN - about $25 US sound reasonable? Whatever I’ll buy it, but will shop around- thanks again!

It's about $18 here, so 25 is a little high but I wouldn't fret too much paying that for it if that was what I could find.
 
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Why Zerex G-05? Do you think it has magical powers or works better than any other coolant (if changed when it should be)? It doesn't. 🤫