On Tuesday, November 21, 2017 at 10:03:34 PM UTC, wrote:
On Tuesday, 21 November 2017 13:08:50 UTC, sm_jamieson wrote:
My fireplace is made of tiles - stuck over a former which seems to be a mix of concrete and iron strengtheners.
The tiles were originally stuck by bedding in some type of cement product that is very tough and I cannot remove it without damaging a lot more of the fireplace. So I need to "glue" back the loose tiles.
The fireplace is not used much and will not need to withstand very much heat.

The glue needs to be very thin so the replaced tiles are not noticeably proud of the others - so probably not epoxy or contact adhesive, or tile adhesive.

So which glue to use ?
1. PVA - probably would work to some extent
2. PVA + SBR - a bit better than 2.
3. PVA and/or SBR + cement slurry
4. Gorilla glue - oozing edges might be a pain
5. Anything else ?

Simon.

PVA has no gap filling ability, so unlikely to work. I learnt that the hard way.
Epoxy is thin enough if you just dot it about, I don't know about its temperature resistance.


Also PVA needs at least one porous surface or it never dries out.
Simon.