toobfreak
Tungsten/Glass Member
Stopleak will actually block up a heater core so it won't work anymore.
Yeah, not the best way of fixing a drippy heater core, but at least it stops the leak on your floor. It's a Hail Mary play. If you can get the air pockets out of the core, you stand a better chance of it just fixing the leak. Either way, once a heater core goes, you are bound to be needing to replace it sooner or later.