Water stain

[missieb]

I have a water stain on my white emulsioned ceiling. Should I treat it with anything before re-emulsioning it? Thanks.

[pab]

Try covering it with white undercoat,I have used this to cover a ceiling that was stained from smoking,easier than cleaning if it has a rough surface like most modern ceilings now.The stain won't come through if is not a water based paint.

[woodchopper]

Had this problemon the mother in-laws ceiling. I used a proprietary sealer especially designed for sealing stains.
Just roller it on and leave to dry and then re-coat with whatever you want.
Have been told a coat of gloss paint over it first would do the same thing.

[missieb]

Many thanks for your answers. Will do just that when I'm sure it is properly dry.

[pab]

If you use Gloss you may have trouble covering it,udercoat is matt and will cover.

[katerich48]

There is a special paint that you can buy in a tin or an aerosol can (which is easier for ceilings) it covers it and stops it coming through again...

[missieb]

Spray sounds brilliant - anybody know what it is called or who makes it?

[feebal]

I used the spray, it was Thompson's Damp Seal. I found that the spray was much cheaper if you just have a small amount to cover. The paint on version was very expensive. I got it from B&Q on the damp proofing type section. It worked a treat for me, good luck.