Originally Posted by
Ian W
A quick and dirty fix is done by someone with a barrow and some melted pitch 'crack filling'. This can work reasonably well as a temporary fix, but in hot weather ... it can melt rapidly and cease to hold the broken surface in place. ...
And Auckland has indeed been having some very hot weather recently (shade air temperatures don't look high to people used to real heat, but direct heating from the sun is just what you'd expect from the latitude).