On 23/04/2014 12:30, Davidm wrote:
On Wed, 23 Apr 2014 08:46:27 +0100, stuart noble
wrote:

On 23/04/2014 00:26, Dave Plowman (News) wrote:
In article ,
Tricky Dicky wrote:
I have used Polyfilla quickset cement to repair damaged rendering. It
sets quick, is tough and looks like mortar when set. Will probably do
what you want, the only difficulty might be colour matching your
stonework. If you are over painting then it will not be an issue.

Thanks - I'll have a look. It is painted, so colour doesn't matter.


I've used ordinary cement with pva as a fine surface filler. Unlike some
fillers, it even gets into hairline cracks
Do you mean just cement powder and pva?

I thought cement powder (as in Portland cement) was just a binding
agent and needed a "filler" (sand, ballast etc) for strength and bulk,
and on it's own it has neither.

I wonder if your mixture might work well on thin cracks in exterior
wall rendering, my walls must move slightly under summer sun, as the
bloody cracks come back year after year! PVA presumably gives it some
flexibility?


Cement sets rock hard on its own but is very brittle, hence the pva.
Main thing is, it's incredibly fine. Cement based flooring grout might
be worth a try