steel seal - anyone has experience?

[shogun]

http://www.steelseal.com/eng/home.html

quote
A great deal of valuable time and money can be spent on engine repair because of a cracked head or blown head gasket. Before you invest all that time and money disassembling an engine to repair a cracked head or gasket, try Steel Seal™, a patented chemical formulation that provides you with a convenient and affordable alternative to costly engine repair.

Steel Seal™ creates a permanent seal that will withstand high temperatures and high pressure. The product can be used in both gasoline and diesel engines.

With adherence to the manufacturer’s directions and proper diagnosis, you will enjoy virtually effortless engine repair that will free you up to maximize the profits in your shop.
unquote

No, I have never used it, I am not their sales agent, just want to hear about real experiences, not advertisement.

Please tell me your steel seal story :)

[shogun]

ooohh, many comments here, should have searched before in the internet

Do 'head gasket repair potions' like ThermaGasket work?

http://wiki.answers.com/Q/Do_'head_gasket_repair_potions'_like_ThermaGasket_ work

[Espen]

Im by nature generally sceptical to this kind of fixes.
Ive tried the stuff to prevent water leaks in the radiator it worked great, but never tried it to fix a headgasket..

[Ross]

This stuff might seal a head gasket leaking into the crankcase briefly but I seriously doubt it could improve a leak at the fire ring. Same with cracks. As long as they aren't subjected to combustion pressure then pehaps a temporary "fix".

[RallyD]

no way will it hold combustion pressure.

never used that but did just try Mighty Putty. That stuff is great.