Unibond - express putty

Been getting putt putt noise coming from lhs manifold side, tried to see where blow was comin from not no avail. Today used stick with tissue on to try find leak n found it, panicked a bit when read it could've been head gasket , had quote of round £ 1000 for that doin if worst case scenario , no it's only temp fix but used putty 6 month ago on other crack on manifold n that's still goin strong.
So great stuff no only temporary but proper fix will have to wait till back @ work n funds available.