Well, not very well it seems, I have tried dampening the walls, keying in and two differing makes / batches but the result is still the same - I leave for a few days and the bonding is very weak - a fingertip touch and it comes unstuck. Have tried priming with 1:5 PVA but even worse, so wondering if its just too warm to do this at the moment ? (which I can't believe)
Anyone any ideas ?
Thanks,
Nick