No expiration date, although I assume that it will eventually get something that wants to grow in it. It's sealed, storing it for a few years won't do much.
Water is ok in a pinch, but if you're in an area where you can experience freeze, you don't want water in a closed tank with tubing and a pump. You'll replace all of them when it freezes.
I live in a place where freezing isn't an issue. Maybe I'll stock up and ride in style after the apocalypse.
Everyone else is going to have zombie guts splatted on their windshield, but not me!
Also,
Hmmm...looks like Dew and Debbie is probably not a good thing to store?
Only if your hamster is a traitor. Make sure you run a background check on your hamster.
Can't you buy it in tablet form that you just mix with water? Probably from China...
I’ve seen cleaner for windows in that form ( like for your house ) but car washer fluid usually contains some solvents to help break road grime down.
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