[TBird65]

Got a blow head gasket or a nasty leak that's going to cost a small fortune to fix? Well, here's a suggestion; try Blue Devil. My father had a blown head gasket on hid 2006 Explorer (V6, no joke to fix even for the most experienced mechanics. He was actually turned down by several because they just didn't want to deal with it.) and tried this stuff. That was about 3 months ago and it hasn't skipped a beat since! It costs $60 but that's nothing compared to the $1200 he was going to be charged for a head gasket replacement.

[Adam12]

There are lots of head gasket "fixers" on the market, and some work very well, but usually only for a short time. Eventually, you will have to replace the gasket and repair the damage that caused the blown head gasket in the first place.