What are the groups recommendations for a stain block to cover the brown stain on a ceiling where water leaked from a bathroom. It's all dry now but presumably a stain block is recommended before repapering and emulsion.
Thanks,
Peter
Roneal do an aerosol stain block which seemed very effective, and quick-drying.
Don't know about anyone else but I have always used dilute PVA. Seems to work.
Andrew
You definitely need something, otherwise you are in for a lot of coats of standard emulsion. I used one of the sheds own, but it wasn't much good, and needed about 4 coats to get rid of the stain.
R.
Any oil based undercoat will work. If it is a really dark stain it might take a couple of coats. Then emulsion as normal.
Mike P
will it get thru the new wallpaper too? Cheers JimK
Can't honestly say .. probably not .. but it will only take 5 mins to "seal" the stain.
Mike P
Eventually yes, how fast depends on the paper. Thin stuff quite quick, vinyl might be OK.
As to stain blockers, the aerosols are quick but watch the overspray, it'll turn to dust. Other wise oil based paint, obviously coloured matched(ish) to the background colour.
Seconded. Pva certainly doesn't work IME and I would have my doubts about anything water based.
Of course I meant Ronseal.
It certainly is, otherwise it will bleed through, maybe not today. maybe not tomorrow, but soon and for the rest of your life.
Cheap as chips at Toolstation, free delivery over £10
What actually is the stain when this happens... does it come from the plaster in the ceiling or is it just dirt?
David
I think the brown stuff is usually rust from iron fixings.
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