Mist coat or primer needed on plaster?

[Paul F]

Looking for some advice. We have a freshly plastered (8 weeks ago) ensuite to tile. Do I need to put anything on the plastered walls prior to tiling it? I've been told yes and no from various places. Any advice would be gratefully received. 

[Onoff]

I used this. It's brilliant. Can't remember if I watered the first coat down or not though.

 

https://www.screwfix.com/p/leyland-trade-super-leytex-matt-paint-brilliant-white-15ltr/60248

 

EDIT: I did water the first coat down. Probably as it says on the tin. Some say I went OTT on my plastered ceiling and walls...

 

2 coats Leyland Super Leytex 20% water

Gyproc EasiFill 20 as required

Rubbed down

2 coats Leyland Super Leytex neat

3 coats Dulux Diamond Matt

Edited November 3, 2020 by Onoff

[PeterW]

Tiles need nothing under them - I would do the other walls with Super Leytex at least two coats before tiling though 

[Oz07]

tile primer

[tonyshouse]

I have always used PVA as a primer 

[wozza]

8 minutes ago, tonyshouse said:

I have always used PVA as a primer 

 

Nooooo - please do not use PVA.

 

[Mr Punter]

Make sure you paint the ceiling first.

[nod]

You should seal the walls with SPR mixed 3-1

On plaster or straight onto boards which is better 

[SiBee]

What Nod said - diluted SBR. Any brand SBR as prices can vary a fair bit and its all still SBR.

That said, I have a feature wall to tile in heavy split faced stone (onto backer board not plaster) and have picked up some tile master prime and grip to try as it came highly recommended by, er, the shop? I do like tilemaster stuff though and I can pick it up locally.

Never PVA though as someone above has already mentioned.

[Paul F]

Thanks for all the info guys. Much appreciated. I'm going to go with the super Leytex route. (2 diluted coats and 1 neat.)  Cheers

[Oz07]

Under the tiles?! Wrong choice

[Paul F]

12 minutes ago, Oz07 said:

Under the tiles?! Wrong choice

So you say tile primer?

[Oz07]

Yeh either branded same as adhesive or sbr diluted as advised above. 

[Onoff]

Btw, Leyland Leytex is superb as in it covers lovely and looks like a finished coat but it's "fragile". Needs a top coat. 

[Oz07]

I think people need to give their heads a wobble in this thread the guy has asked what primer for tiling on to walls and he's been so confused by all the off piste answers he was about to use emulsion as a primer!!

[Onoff]

40 minutes ago, Oz07 said:

I think people need to give their heads a wobble in this thread the guy has asked what primer for tiling on to walls and he's been so confused by all the off piste answers he was about to use emulsion as a primer!!

 

Whoops! I couldn't have read that more wrong. Sorry there @Paul F! Deffo do not paint plastered walls before tiling. Proper tile primer.