boat engine cover plate

How do I stop a radiator leak?

I need to temporarily fix a leak in my g/f's radiator to get the car home. I know they have radiator stop leak fluids, but would any types of tapes or puddies work?
I'm assuming the plastic top is where the crack is though I haven't seen it


There iffy, cause you put it in then you will be replacing your thermostat from being clogged up with that crap. if you can find the leak. Clean it and put some JB weld on it, let it sit for the day and fill up and go home. Then you won't even have to

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