The last time that I checked for the price of Steel Seal I could buy a head gasket and stretch bolts. Why would I want to believe that this magic in a can would be any better than a new gasket?
Are you selling yourself on this stuff, JT? If I was stuck on the road somewhere I'd be the first person in line to try it. Why not? Maybe this thread needs to see that the other option is not unreasonable. Steel Seal can flog all the testimonials that it wants to. It sort of reminds me of all the other great products out there that we are told work so well that we can't live without them. Remember "Slick 50" ?? Or if you are old enough "Rislone" ??
If you look at the instructions on their web site, http://www.steelseal.com/eng/instructions.html, it's not a simple dump into the rad and drive fix. Having said that, a friend of mine used this on his Cavalier, and if you've ever worked on them you know what their head gaskets are like. After 3 garage head gasket replacements, he used this when he got another leak. The leak he had was external, not into the combustion chamber. According to him, the product worked exactly as advertised, and he has driven the car for at least three years since using the product with no further problems. I myself have used other competing products that are supposed to seal coolant leaks and all that I tried were pure snake oil, but based on his experience I wouldn't hesitate to use this product in a beater that I didn't want to tear into.
If Dupont chemists (the company that makes it, read the link) will not endorse the use of PTFE in motor oil, then why would you think that some huckster's promise of all kinds of value is anything but BS? (read the link about independent research)The leak on a Cavalier motor from coolant jacket to atmosphere about 15 psi is an entirely different leak than one from the combustion chamber of a diesel at 500 psi to the coolant system like what has been described here. If Steel Seal works then all well and good but be prepared for the possibility that it fails especially after a couple of major temperature variations such as what you find in the winter where the block undergoes a significant expansion and contraction cycle because of the extreme temperature changes. Would you rather change the gasket in the winter or the summer? I know what my answer would be. I have spent too much time messing with vehicles in the cold and it has to be the worst possible time!