If it IS really wide and has the
chance of opening up more in the
future
{ i.e., an area that MIGHT bend some }
then I'd double team it ! Use the
backing soda and super glue INSIDE
the crack and then use a good putty
to COVER the crack ! That way, there
would be NO WAY down the road it could
re-open as the glue holds it FIRM !
Oh, and footnote too for the
baking soda superglue! Be VERY careful
when you do this, as you add the superglue
to the baking soda it can emit " FUMES "..
VERY VISIBLE fumes that STINK and BURN
the crap out of your eye's if too close !