Good

Seemed to of worked

Had a radiator blow while driving for a move. It turned out that my head gasket had a small leak and combustion gases were over-pressurizing the coolant system. After replacing the radiator, I put some of this in and followed the directions. No more bubbles in the coolant. It has been about 500 miles of driving now and the seal is still holding.

Back in September of 2019, my 2003 Infiniti G35 sedan's radiator finally burst spilling and splattering hot coolant all over the ground. Replaced the radiator with a new one and also changed the thermostat. The car's temperature gauge kept going beyond the half-way point after a few miles of driving before pulling over to the shoulder. The diagnosis was ultimately a head gasket issue, which would involve quite a bit of money and time without the vehicle. So, decided to give Bar's Leaks 1111 Block Seal Permanent Head Gasket Fix 24 oz. a try, and it is now August 2020, and still no overheating issues nor white smoke from the tailpipe. This is a real review for those doubters, and I'm not getting paid for this review and is unsolicited.