How long before tiling over new plaster

[spikeyhead]

I'm about to tile a kitchen splashback, however I've had to hack a bump of bodged repair out of the old plaster, about 10 inches square, which will need a a fresh coat in finishing plaster.

How long do I have to leave it before tiling with 4 inch by 8 inch tiles?

[wolfracesonic]

If it’s just finishing plaster, leave it till it goes a light pinky colour, so a day or so and for a belt and braces job, give it a coat of BAL prime APD before tiling…but for an area you describe, can’t you you just use an extra dollop of tile adhesive?

[Pheo]

How deep? Backfill with bonding. Needs to go salmon pink. However not really convinced you need to repair the plaster - if it’s not deep - will just make your tiling slightly easier.

[spikeyhead]

It's done now, deepest was about 5mm, too deep to just tile over.

I'll probably leave the tiling until next weekend when I'll have time to make sure I don't rush it.