I'm about to lay some ceramic tiles on our kitchen floor but the concrete onto which I'm laying it is a bit dusty, i.e it produces dust if swept with a broom.
Is there a surface treatment which will stabilise it so that the tile cement will stick to it?
Yes.
Soak it in 1:1 diluted SBR - ideally as much as it will absorb in one session.
It will set it like a rock through quite a thickness from the surface due to the excellent penetrative powers of SBR.
Tile adhesive loves SBR and it is 100% water resistant (as in the SBR is stable and will not go mushy - it does give some water resiting properties to the substrate but it is not tanking).
IME tile cement will bind up any amount of dust when applied with a spreader. A 10% pva solution makes a good stabiliser to be on the safe side
which I'm laying it is a bit dusty, i.e it produces dust if swept with a broom.
will stick to it?
Its no big deal - just slosh water on it before the cement Or use thinned PVA. I've done both. Both work
Thanks to all for the advice.
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