I have a brown stain (no jokes please) in the corner of my ceiling that won't cover up no matter how many coats of emulsion I give it.
The ceiling is of lathe and plaster construction and is painted in Dulux white emulsion. I think the original stain was caused by a leak from the bath waste a couple of years ago that has long since been cured and fully dried out.
Is there a product on the market that I can use to seal the ceiling to stop this stain coming back?
Thanks for any advice, Sean