Covering some smelly paint

paintpaintingsealsealantsmell

Recently (4 days ago) I replaced a solid radiator with a column one. On removing the solid radiator the wallpaper was as you might expect an old colour.

I managed to find an opened tin of paint the same colour that we used 3 years ago when we painted the room and applied it to the wallpaper before fitting the new radiator.

However, once it dried it was clear there was an unusual smell coming from the paint. It smells like washing does when you forget to take it out of the washing machine for a day or so. It smells like damp/off water. There is certainly something bad about the paint…

The smell is still there after 4 days so I want to seal the section of paint with something and repaint it with a fresh tin. Luckily I haven't plumbed in the radiator yet so this will be a quick job.

My question is: what's the best thing to seal the bad paint with? Obviously I want to prevent the smell coming through. To hand I have the following:

I'm happy to go and buy something else of course. What's the best way to seal off this smelly paint?

Best Answer

You're describing the smell of mold or mildew. It's a living fungus that sometimes grows on walls, paint, wood, clothes when conditions are right. You want to kill it and remove it.

Mold can grow under wall paper and paint.

If it were me I would clean it with some mold killing cleaner according to directions. Remove the wallpaper, bag it and throw it out. Clean the area again. Prime and paint.

There are special encapsulating paints to cover up mold and recently Zinsser came out with a Mold Killing Primer. I haven't used it myself but I've used other Zinsser mold/mildew resistant paints and have been pleased but as I said I'd use it in conjunction with wallpaper removal.