Hi,

I was wondering if anyone knows where I can come by a plaster bonder
like this one:
http://www.larsenproducts.com/plasterweld.htm
in the UK?

We've recently had the bottom metre of our walls plastered (following a
dpc installation) and they look lovely, but the top part (following the
removal of 4 layers of wallpaper) is covered in sound but messy paint
remains and other marks and dints.  We want to paint, but that will
obviously show up the marks.  So I was planning to paint a plaster
bonder then skim it (or get someone more capable to skim it) with
multi-finish.   Unless anyone has any better ideas?

Thanks for any advice,

Tim

Biguana wrote:


> I was wondering if anyone knows where I can come by a plaster bonder
> like this one:
> http://www.larsenproducts.com/plasterweld.htm
> in the UK?



It's just PVA + water. They even provide you with an MSDS which says so!

Buy this:
<http://www.screwfix.com/app/sfd/cat/pro.jsp?id=40773&ts=99113>

and dilute it in water, about 1:3 pva:water.




> We've recently had the bottom metre of our walls plastered (following a
> dpc installation) and they look lovely, but the top part (following the
> removal of 4 layers of wallpaper) is covered in sound but messy paint
> remains and other marks and dints.  We want to paint, but that will
> obviously show up the marks.  So I was planning to paint a plaster
> bonder then skim it (or get someone more capable to skim it) with
> multi-finish.   Unless anyone has any better ideas?


No, that sounds like a good plan.


-- 
Grunff

Cheers.  I would just go with the PVA bonding (we used that on the
brickwork for the other plaster), but the plasterer that we got to do
the bottom metre (a kind of friend of the family) said that PVA
wouldn't do for the top, it needs to be a plaster bonder that reacts
with the plaster (obviously there's no scoring for it to grip to).
Unfortunately he couldn't recommend a source (or even remember a brand
name).

The PlasterWeld faq says "applied as a liquid and as it dries to a
thin, flexible film, it forms a tenacious bond to the structural
surface. The dry film is reactivated by the moisture and chemical
reaction that occurs as the new plaster dries. Full bonding strength is
achieved after the new plaster has completely dried."

I think that's the sort of thing I need?

Tim

Biguana wrote:

> Cheers.  I would just go with the PVA bonding (we used that on the
> brickwork for the other plaster), but the plasterer that we got to do
> the bottom metre (a kind of friend of the family) said that PVA
> wouldn't do for the top, it needs to be a plaster bonder that reacts
> with the plaster (obviously there's no scoring for it to grip to).
> Unfortunately he couldn't recommend a source (or even remember a brand
> name).
> 
> The PlasterWeld faq says "applied as a liquid and as it dries to a
> thin, flexible film, it forms a tenacious bond to the structural
> surface. The dry film is reactivated by the moisture and chemical
> reaction that occurs as the new plaster dries. Full bonding strength is
> achieved after the new plaster has completely dried."
> 
> I think that's the sort of thing I need?



Erm, maybe I wasn't clear. PlasterWeld *IS* PVA. Same stuff.


-- 
Grunff

Sorry, you were perfectly clear, and I'm quite happy to accept that any
confusion here is on my part (although I would have expected "our
plasterer" to be more knowledgable on the subject).

So you're sure a skim of plaster would adhere fine to unscored
paint\plaster covered with 1:3 pva:water?  I know you've said as much
but I want to be careful if I'm not using something that explicitly
specifies that's what it's purpose is...

Tim

Biguana wrote:

> Sorry, you were perfectly clear, and I'm quite happy to accept that any
> confusion here is on my part (although I would have expected "our
> plasterer" to be more knowledgable on the subject).


It could be that your plastere meant a different type of product - 
perhaps you could get him to give an example of the product he meant.



> So you're sure a skim of plaster would adhere fine to unscored
> paint\plaster covered with 1:3 pva:water?


Yes - we did this in several of our rooms, and it worked great.



> I know you've said as much
> but I want to be careful if I'm not using something that explicitly
> specifies that's what it's purpose is...


I can understand your caution.


-- 
Grunff

Grunff wrote:


> Erm, maybe I wasn't clear. PlasterWeld *IS* PVA. Same stuff.


My reaction was just use PVA, too - never heard of this stuff.

However, looking at the data sheet, the recipe also contains glycol 
butyl, benzyl phthalate and "other components are ... ... trade secrets"

I haven't a clue what these other chemicals do, but might they not be 
crucial in distinguishing Plasterweld from raw PVA?

David

Biguana wrote:

> Sorry, you were perfectly clear, and I'm quite happy to accept that any
> confusion here is on my part (although I would have expected "our
> plasterer" to be more knowledgable on the subject).


Maybe, but don't guarantee it... - once "my plasterer" (make that 
"former plasterer"!) told me I should prime my newly-skimmed plaster 
with dilute PVA prior to emulsioning, rather than using diluted emulsion 
as I always had done in the past - result was that it sealed the surface 
and the new emulsion just kept peeling off: an unmitigated shambles!

David

"Biguana"  wrote in message
news:1126694628.960510.123300@g47g2000cwa.googlegroups.com...

> Hi,
>
> I was wondering if anyone knows where I can come by a plaster bonder
> like this one:
> http://www.larsenproducts.com/plasterweld.htm
> in the UK?
>
> We've recently had the bottom metre of our walls plastered (following a
> dpc installation) and they look lovely, but the top part (following the
> removal of 4 layers of wallpaper) is covered in sound but messy paint
> remains and other marks and dints.  We want to paint, but that will
> obviously show up the marks.  So I was planning to paint a plaster
> bonder then skim it (or get someone more capable to skim it) with
> multi-finish.   Unless anyone has any better ideas?
>
> Thanks for any advice,
>
> Tim
>

=================
I don't know anything about plaster bonder but I think you would probably
make a much better job by repairing the existing plaster rather than trying
to skim over an unsatisfactory surface.

 Use a paint stripper (e.g. Nitromors) to remove the old paint and then use
a combination of filling and sanding to achieve the required finish.

Cic.

In message , 
Biguana  writes

>Sorry, you were perfectly clear, and I'm quite happy to accept that any
>confusion here is on my part (although I would have expected "our
>plasterer" to be more knowledgable on the subject).
>
>So you're sure a skim of plaster would adhere fine to unscored
>paint\plaster covered with 1:3 pva:water?  I know you've said as much
>but I want to be careful if I'm not using something that explicitly
>specifies that's what it's purpose is...
>

So why not prepare the surface i.e. key it

get an angle grinder

-- 
geoff