Review on ACDelco GM Original Equipment 10-108 Cooling System Sealing 🔧 Tabs - 4g (Pack of 5): Optimal Cooling System Maintenance Solution by George Evans

This product was used on a motorcycle and a vintage Ford van with a leaking head gasket. Worked both times. Driven 90,000 km with the van without any problems. Saved him from going to the landfill. I like to try it before chemical sealers because it's less abrasive - it's literally made of spices. I don't know how well it will work on a big leak, but if it's a small one it seems to fix it right away.