Applying anti mould pain onto plaster

Question

I have a patch of mould in a bedroom. I’ve had it checked by a damp specialist who says it’s to do with the temperature of the external wall not penetrating water or other causes of damp. I’ve treated it with mould killer but can I apply anti mould paint directly onto the plaster or do I need to do something else first?

Keith · Accepted Answer

Hi, you need to wash the wall first and then stain block with oil base stain block by brush it is stronger than spray it hope this helps

Ian · Answer

Good afternoon,

I would use Zinsser self priming paint satin. It's a very good mould killer and stain block it guarantees to kill mould for 5 years. 
It's £15 for 1L but worth having. 

Then you can crack on with your white wash and paint!

Phillip · Answer

Yes you can apply anti mould paint directly onto plaster, but try and give the plaster a wipe down with bleach first.

Paul · Answer

You will find this happens when hot air and the cold air from outside meet it causes black mould. Get a good air flow in the room, stain block and repaint

Nikki · Answer

Yes you can put anti mould paint straight on to plaster because it can act as a primer or undercoat

Terry · Answer

I find ronseal stain block works with most stains and as long as it’s applied correctly it works great

Lee · Answer

I would call or email the paint manufacturers, I would think it's designed to go on any surface.

Tamas · Answer

The best thing to do is to get damp still paint before apply for the anti mould paint.
Regards,
Tamas

Robert · Answer

You can use Zinsser sealer paint for mould, it's available from B&Q or Paint Shed or any other stores Dulux etc
Apply over the area after giving wall a sand to remove loose areas

Luis · Answer

It’s best to use a primer first, with stain killer.

Applying anti mould pain onto plaster

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