there is no cheap or easy fix for a head gasket,
this would get you out of trouble provided the coolant was staying in the system an not being blown out.....
its basically like bars leak for radiators........
even then thats not the best cure for the problem.,
I'd be inclined to think of the waterways it would block,i mean what happens to the particles that dont get used, they'll clog up the waterpump an christ knows what else....
IMHO its not worth the hassle