Can I prime new plaster with vinyl silk?

nickj_2

keystone wrote: »

I said oil based because I meant oil based.

err don't you mean solvent based

aboard_epsilon

keystone wrote: »

I said oil based because I meant oil based.

Err... we are now discussing prepping silk finish emulsion prior to overpainting with matt not sealing plaster. Anyway plaster sealer is a waste of money - IMHO of course .

Cheers

The op was or looked like he/she questioned what was meant by oil based ..OP since been back and edited...so its not there now . ..i wasnt getting at you .

never used the plaster sealer ..just mentioned id seen it ..

is it really no good ..i need to know

all the best.markj

keystone

nickj wrote: »

err don't you mean solvent based

Alkyd if you will. I know what I meant.;)

Cheers

keystone

aboard_epsilon wrote: »

The op was or looked like he/she questioned what was meant by oil based ..OP since been back and edited...so its not there now . ..i wasnt getting at you .

No worries.

never used the plaster sealer ..just mentioned id seen it ..

is it really no good ..i need to know

Don't see the point of it TBH. What does it do? It seals the surface ready for painting. What does a mist coat do? It seals the surface ready for painting. Just another marketing department driven product IMHO.

Cheers

slam3000

keystone wrote: »

Either you just have to give the matt something to grab hold of.


I meant as in woodwork.

Cheers

Sorry, bit confused now. Are you saying you use an oil based undercoat for woodword on walls - in place of sanding or a primer - before puttiing on the finishing coats?

Eenymeeny

Oo-er you've got me worried now! I'm sure that I read somewhere on here to seal plaster with vinyl silk before wallpapering. (We usually use matt) I told DH so we've just tried it under our new lounge paper. He did say that he didn't like it and will be going back to the tried and tested matt for the other rooms.
Now I'm worrried that something dire will happen (like going downstairs in the morning to find that the paper's all falllen off!) I'm not going to tell him...I'll just watch with trepidation and keep my advice to myself in future!:o:eek:

keystone

slam3000 wrote: »

Sorry, bit confused now. Are you saying you use an oil based undercoat for woodword on walls - in place of sanding or a primer - before puttiing on the finishing coats?

Yes its one of the options if you want to put matt finish over an existing silk finish. You cannot apply matt direct to slk - it will craze and I have understod that is what you are wanting to do with your walls. You can apply silk to silk or silk to matt or matt to soft sheen or soft sheen to matt. The combination that doesn't work is matt on silk.

Cheers

keystone

Eenymeeny wrote: »

Oo-er you've got me worried now! I'm sure that I read somewhere on here to seal plaster with vinyl silk before wallpapering.

The purpose of sealing new plaster is to prevent it sucking the moisture out of whatever you are wanting to apply to it next be that paint or wallpaper paste. You cannot use silk finish paint nor PVA for this purpose bioth of which end up sitting on the surface rather than penetrating it and they will peel.

Cheers

nickj_2

keystone wrote: »

Alkyd if you will. I know what I meant.;)

Cheers

so not oil , then?;)

iscamaid

keystone wrote: »

The purpose of sealing new plaster is to prevent it sucking the moisture out of whatever you are wanting to apply to it next be that paint or wallpaper paste. You cannot use silk finish paint nor PVA for this purpose bioth of which end up sitting on the surface rather than penetrating it and they will peel.

Cheers

I have been told by my plasterer that I will need to prime the new plaster in my bathroom with a watered PVA several times before tiling. Is this good advice then?