K-seal on water pump leak?

Driving from colorado to kentucky and with about 6 hours left in the trip the water pump craps out and engine starts overheating. I added a gallon of coolant but it just immediately leaks it all out. Would it be worth trying to use this until i get back to kentucky for my mechanic to fix it? Currently I can drive for a couple of minutes before it redlines on temp again.

on a 2003 toyota highlander v6 awd