Blown headgasket and what is therma gasket sealer?

I am about to replace a head gasket on my jeep 1998 cherokee and someone suggested Thermagasket as a solution. I am skeptical.looks like a scam…anybody know about this stuff?

dont use that stuff,thats a band aid(really not even that)that stuff may get you home from an off road adventure,but temporary, just follow the manual and do the gasket the proper way.