That's a great idea to get you home as Stewart was saying..never thought of that . I've always wondered what I'd do if I blew a head gasket while on a holiday , take a risk with a local mechanic? . If you could put that stuff in to get you home, it could save you being at the mercy of some monkey with a spanner (i.e dodgy mechanic). I may be a monkey also, but I take more time because it's my own car and want the job done right.
Does it fix a large majority of HG problems temporarily?. Our parents SV11 camry blew a headgasket about 5 years ago and the car would hardly make it down the street. From running fine to almost tow job in a metter of minutes .