I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

On 2/5/2018 4:26 PM, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

I just use shellac.

On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

Yes, you can still get something similar. But white oil-based undercoat
is just as effective. Then re-coat it with emulsion when dry.
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Roger
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On Mon, 5 Feb 2018 16:30:08 -0500, S Viemeister
wrote:

On 2/5/2018 4:26 PM, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

I just use shellac.

There are a number of aerosol preparations, I used two, but have no
recollection of the name. I used two because I dumped the first
thinking I would never need it again :-) I would guess that they are
all of a similar mix.

Standard bedroom ceiling, I noticed a brown patchon the plasterboard
around 20years back. Did nothing apart from inspect the loft [Dry].
Patch darkened and spread at around 0.7m^2, I bought my first spray a
couple of years after the first sighting.

Job done, cured, for two years then a respray was needed.

Over 10 years it has had around five treatments [10 minute job]

The brown stain is just starting to reapear now.

The return is now more sluggish and only noticeable I am sure because
I look for it.

Probably the best solution would be to remove the plasterboard and
replace.

I don't regret using the spray, even if the occasional recoat is
needed, replacing the plasterboard wouldnt be fun.

Incidentally, the stain looks like a damp patch, but the loft is bone
dry and the wall in contact with the dicoloured ceiling is
plasterboard also and isn't stained.

Maybe the stuff was contaminated with something during manufacture.

In my case I was happy. A quick squirt over the years was a small
effort considering the result.

AB

On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?


https://www.toolstation.com/shop/p68...=stain%20block

On 05/02/2018 21:52, Roger Mills wrote:
On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there
having been a leak from the room above.

My experience of stains like this is that however many coats of
emulsion you apply it still ends up brown. I remember there being an
aerosol called Stain Block or some such - is it still available and
does it work?

Yes, you can still get something similar. But white oil-based undercoat
is just as effective. Then re-coat it with emulsion when dry.

+1
Thats all I have ever done.

On 05/02/18 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

A Dulux water based, white stain block paint gave me good results.
TW

On Monday, 5 February 2018 21:26:51 UTC, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

there are several things you can use to block stains. Most work most of the time, none work all the time.
Undercoat for woodwork, the alkyd solvent sort
PVA diluted
shellac in solvent
shellac flakes dissolved in alcohol
commercial stain block paints
eggshell paint

I'd seldom recommend sprays, sprays tend to get everywhere and don't keep well.
In the worst cases it can be necessary to keep alternating spirit based & water based layers several times, but usually one layer does the job.


NT

On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from
there having been a leak from the room above.

My experience of stains like this is that however many coats of
emulsion you apply it still ends up brown. I remember there being an
aerosol called Stain Block or some such - is it still available and
does it work?

Something like Zinsser B.I.N is a shellac based primer / undercoat that
will prime and seal pretty much anything, and is an effective stain block:

http://www.zinsseruk.com/product/b-i-n/

They also have another product called 123 which is water based (hence
fast drying, and easy to clean brushes etc) that is nearly as good IME.

--
Cheers,

John.

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| John Rumm - john(at)internode(dot)co(dot)uk |
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On 05/02/2018 22:34, ss wrote:
On 05/02/2018 21:52, Roger Mills wrote:
On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from
there having been a leak from the room above.

My experience of stains like this is that however many coats of
emulsion you apply it still ends up brown. I remember there being an
aerosol called Stain Block or some such - is it still available and
does it work?

Yes, you can still get something similar. But white oil-based
undercoat is just as effective. Then re-coat it with emulsion when dry.

+1
Thats all I have ever done.

+2

--
Cheers, Rob

On Monday, February 5, 2018 at 10:34:49 PM UTC, ss wrote:
On 05/02/2018 21:52, Roger Mills wrote:
On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there
having been a leak from the room above.

My experience of stains like this is that however many coats of
emulsion you apply it still ends up brown. I remember there being an
aerosol called Stain Block or some such - is it still available and
does it work?

Yes, you can still get something similar. But white oil-based undercoat
is just as effective. Then re-coat it with emulsion when dry.

+1
Thats all I have ever done.

+1.

On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?

Yes, and yes.

On 06/02/2018 08:18, Chris Bartram wrote:
On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there
having been a leak from the room above.

My experience of stains like this is that however many coats of
emulsion you apply it still ends up brown. I remember there being an
aerosol called Stain Block or some such - is it still available and
does it work?

Yes, and yes.

Be 'generous' with it. Not so much in terms of applying thickly but do
cover a decent area around the stain.

For, say, a 2" ring (diameter), I'd apply stain block over 6" dia min.
I've not used it for some time but, as I recall, you apply a couple of
coats.



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are depriving those in real need!

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Thanks for the advice everyone, I like the sound of the Zinisser stuff

Dunno but something made by unibond fixed my stains from a loft tank leak.
It was on poly tiles and it seems to have lasted after a couple of coats of
emulsion on the ceiling, but sorry cannt recall the product it was some
years back and suggested by a bloke in b/q, the stuff dried a kind of crackl
hard shell on the times as I recall.
Brian

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----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Murmansk" wrote in message
...
I've been asked to sort out a ceiling that has brown stains from there
having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion
you apply it still ends up brown. I remember there being an aerosol called
Stain Block or some such - is it still available and does it work?

On Tuesday, February 6, 2018 at 12:53:32 PM UTC, Brian Gaff wrote:
Dunno but something made by unibond fixed my stains from a loft tank leak.
It was on poly tiles and it seems to have lasted after a couple of coats of
emulsion on the ceiling, but sorry cannt recall the product it was some
years back and suggested by a bloke in b/q, the stuff dried a kind of crackl
hard shell on the times as I recall.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Murmansk" wrote in message
...
I've been asked to sort out a ceiling that has brown stains from there
having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion
you apply it still ends up brown. I remember there being an aerosol called
Stain Block or some such - is it still available and does it work?

Most of us have got an old tin of solvent based paint lying around. One coat is enough

On 05/02/2018 21:26, Murmansk wrote:
I've been asked to sort out a ceiling that has brown stains from there having been a leak from the room above.

My experience of stains like this is that however many coats of emulsion you apply it still ends up brown. I remember there being an aerosol called Stain Block or some such - is it still available and does it work?


Available from Toolstation and works a treat, use it often.


--
Dave
The Medway Handyman