repair processr and the leaked stopped within about 60 minutes after the thermostat opened. I was a bit leary of using a stop leak for fear of clogging up my heater or radiator but so far I have no problem with that. Your sealer appears to have saved me over a grand in repair cost....
I would disconnect the negative side to the battery and give it 30 seconds. Attach it back on, but put a tender on the engine terminals and try it again. If you continuously hear gurgling, try squeezing the radiator hoses for pockets of air. ...