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Old October 17th 04, 05:18 PM
Rob Bradley
 
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Default Plaster sealer

Is the plaster sealer sold in bottles and tins, eg B&Q Interior
Plaster Sealer, just an expensive way of buying water with a bit of
PVA mixed in? Couldn't I just use say a 1:3 PVA:water mix? Would one
coat be enough on new plaster before painting?


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Old October 17th 04, 09:50 PM
Lobster
 
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"Rob Bradley" wrote in message
...
Is the plaster sealer sold in bottles and tins, eg B&Q Interior
Plaster Sealer, just an expensive way of buying water with a bit of
PVA mixed in? Couldn't I just use say a 1:3 PVA:water mix? Would one
coat be enough on new plaster before painting?


I recently coated a whole, newly-plastered house with 1:4 PVA at the behest
of the plasterer, and it was a disaster. It rendered the surface
impermeable, sort of non-stick, and the newly applied emulsion could be
scraped off with fingernails after it had dried. Next time I'll use
diluted, cheap white emulsion as I always have in the past.

David


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Old October 17th 04, 11:17 PM
chris French
 
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Default

In message , Lobster
writes
"Rob Bradley" wrote in message
...
Is the plaster sealer sold in bottles and tins, eg B&Q Interior
Plaster Sealer, just an expensive way of buying water with a bit of
PVA mixed in? Couldn't I just use say a 1:3 PVA:water mix? Would one
coat be enough on new plaster before painting?


I recently coated a whole, newly-plastered house with 1:4 PVA at the behest
of the plasterer, and it was a disaster. It rendered the surface
impermeable, sort of non-stick, and the newly applied emulsion could be
scraped off with fingernails after it had dried. Next time I'll use
diluted, cheap white emulsion as I always have in the past.

Yep, I always use diluted white emulsion for the sealing coat. i've
noticed that where PVA is on the wall (the plasterers used it when doing
coving) that the film of the paint layer seems very thin with no
covering power so it looks like you'd need another coat anyway.

I note on the Dulux Trade emulsion they just say to seal bare plaster
with dilute emulsion, it's only on the tins of 'consumer' paint that
they seem to mention the plaster sealer.
--
Chris French, Leeds
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Old October 18th 04, 11:09 AM
Christian McArdle
 
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Default

Is the plaster sealer sold in bottles and tins, eg B&Q Interior
Plaster Sealer, just an expensive way of buying water with a bit of
PVA mixed in? Couldn't I just use say a 1:3 PVA:water mix? Would one
coat be enough on new plaster before painting?


Use Dulux Trade White Supermatt, diluted 25% water, 75% paint. Follow by 2
coats of coloured Dulux Trade Supermatt. This paint is specifically
formulated to enable new plaster to breathe. Personally, I wouldn't use
anything PVA, or even use a standard vinyl emulsion.

http://www.duluxtrade.co.uk/webapp/w...sheets/410.pdf
http://makeashorterlink.com/?T1CC23D89

Christian.


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Old October 18th 04, 02:59 PM
mike. buckley
 
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Default

In message , Lobster
writes
"Rob Bradley" wrote in message
...
Is the plaster sealer sold in bottles and tins, eg B&Q Interior
Plaster Sealer, just an expensive way of buying water with a bit of
PVA mixed in? Couldn't I just use say a 1:3 PVA:water mix? Would one
coat be enough on new plaster before painting?


I recently coated a whole, newly-plastered house with 1:4 PVA at the behest
of the plasterer, and it was a disaster. It rendered the surface
impermeable, sort of non-stick, and the newly applied emulsion could be
scraped off with fingernails after it had dried. Next time I'll use
diluted, cheap white emulsion as I always have in the past.

David



Why do we have to do this anyway? I've just had new french doors fitted
to the lounge and have never painted over fresh plaster before.
Unfortunately I was halfway through painting the new plaster before I
remembered most people apply dilute emulsion to seal it. I still have
the rest of the new conservatory to paint so will go the dilute route
with that, but the small bit I did with full strength emulsion seems
fine - so why use dilute at all?

--
Mike Buckley
RD350LC2
http://www.toastyhamster.freeserve.co.uk
BONY#38


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Old October 18th 04, 04:53 PM
Andy Luckman (AJL Electronics)
 
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Default

In article , mike. buckley
wrote:

I still have
the rest of the new conservatory to paint so will go the dilute route
with that, but the small bit I did with full strength emulsion seems
fine - so why use dilute at all?


The paint will come off in great sheets if the plaster isn't prepared
properly first. Not sure how long it will take, but it happened in a house I
moved into. Stripping the remains of the paint left pristine plaster
underneath!


--
AJL Electronics (G6FGO) Ltd : Satellite and TV aerial systems
http://www.classicmicrocars.co.uk : http://www.ajlelectronics.co.uk



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