Consequences of using Radweld.

[david]

Had to use Radweld to fix coolant leaking from my 2.8 sport in an emergency.
Couldn't see where leak was coming from, but there was a lot of coolant pooled under the front of the car. Radweld solved it and got me home, but I'm worried about how long it will last, and more importantly if its likely to cause problems with water pump etc if I leave it in the system. Anyone had similar experience?