http://www.rxauto.com/application.htm

I have an old Toyota PU with a V6, working on my third blown head gasket in 325K miles. I put the first two gaskets in and they blow in the same place every time. No water in the oil. I don't want to do the job again if it can be avoided and the truck is not worth paying to have it done. So the question is would you go the $113 at the risk of having to do it anyway? So anybody here try this stuff?

Sounds like you need to get the head(s) shaved. Warping is likely the culprit. I don't put faith in anything that seeks a leak and fills it. That same product also tends to clog heater cores and radiators IMHO.

The heads have a design flaw that causes the gasket to fail at the water jacket between the cylenders. It was recalled for the fix of a better gasket, but they still pop at around every 80,000 miles. I love the truck but between the rust and high milage, I'm not sure I want to go the $300 for parts to do the job. If I get one or two years out of the chemical fix I would be happy.