Chris Bacon wrote:

Ahbut, sticking it together does a far better job, if the crack is
"fine", say 1/2 mm, caulk won't take up the movement. The PVA treatment
is also excellent for plaster & lathe ceilings, as it glues up any sandy
stuff which would otherwise fall from above, bulging any paper and
displacing filler... try it!


While I'm a *big* fan of PVA, I've used flexible filler on all the fine
cracks we had in our plaster, with very good results. Much quicker and
easier IMHO.


--
Grunff