But in my opinion it should only be viewed as a temporary fix. Like a donut, you don't want to ride on it for too long or it could cause worse damage than a blown tire. I have no personal experience with those types of sealers but I feel like it should just be something ( if they work at all ) to use until you have the money to replace the head gasket. If you could find other means of getting around, I'd suggest just buy the head gasket and DIY, it might take a while but it'll save you a bunch of money.
Wherever you go, there you are