knotting solution

Fred

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Apr 23, 2012, 3:56:03 AM4/23/12

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Hi,

About three years ago I put up some architrave that I know I painted
with knotting solution yet the knots are starting to show through the
paint. What could have gone wrong?

I always coat any knot by brushing on one coat of knotting solution.
Should I apply more than one coat or should I apply it more thickly?

I see Ronseal now make an all-in-one primer, undercoat, and knot
blocker. Has anyone used it? Reading the tin you need two coats, so I
suppose there is little advantage over using one coat of primer and
one coat of undercoat but if the knot-blocking part works, it could be
useful. Has anyone used this?

TIA

Brian Gaff

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Apr 23, 2012, 4:02:08 AM4/23/12

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Wrong kind of knots?

Obviously knot a good product.
Brian

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Jim K

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Apr 23, 2012, 4:25:30 AM4/23/12

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On Mon, 23 Apr 2012 08:56:03 +0100, Fred <fr...@no-email.here.invalid>
wrote:

> Hi,
>
> About three years ago I put up some architrave that I know I painted
> with knotting solution yet the knots are starting to show through the
> paint. What could have gone wrong?
>
> I always coat any knot by brushing on one coat of knotting solution.
> Should I apply more than one coat or should I apply it more thickly?
>

ISTR knotting is two coats but whether that's just for extra consumption &
repurchase?

whose was it? cheapo or kwolity?

clear nail varnish also works well.

Jim K

Dave Liquorice

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Apr 23, 2012, 4:38:36 AM4/23/12

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On Mon, 23 Apr 2012 08:56:03 +0100, Fred wrote:

> About three years ago I put up some architrave that I know I painted
> with knotting solution yet the knots are starting to show through the
> paint.

"Show through" as in blister and ooze resin or just slight
discolouration in a pale paint?

--
Cheers
Dave.

stuart noble

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Apr 23, 2012, 5:47:33 AM4/23/12

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> clear nail varnish also works well.
>

Does it? Logically it should, the varnish being insoluble in turpentine
type solvents. Much more convenient to use too with that little brush
and all.

harry

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Apr 23, 2012, 12:15:55 PM4/23/12

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The alternative treatment is to heat the knot with a blowlamp. Burns/
evaporates the resin out.

Nick

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Apr 23, 2012, 1:15:45 PM4/23/12

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"Fred" <fr...@no-email.here.invalid> wrote in message
news:1g2ap7l711locd2lm...@4ax.com...

A good coat of shellac perhaps. That's all (decent) knotting solution is.

Fred

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Apr 23, 2012, 1:18:56 PM4/23/12

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On Mon, 23 Apr 2012 09:25:30 +0100, "Jim K" <jk98...@gmail.com>
wrote:

>ISTR knotting is two coats but whether that's just for extra consumption &
>repurchase?
>
>whose was it

It was from Toolstation and was branded as a Toolstation own brand. I
notice that they currently show a branded product on there web site:
http://www.toolstation.com/shop/Knotting+Solution+500ml/p28317

So perhaps they have changed suppliers since I bought mine; it was a
few years ago.

Fred

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Apr 23, 2012, 1:23:30 PM4/23/12

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On Mon, 23 Apr 2012 09:38:36 +0100 (BST), "Dave Liquorice"
<allsortsn...@howhill.co.uk> wrote:

>"Show through" as in blister and ooze resin or just slight
>discolouration in a pale paint?

No blisters or oozing, just a brown discolouration on white paint.

Fred

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Apr 30, 2012, 4:48:27 AM4/30/12

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On Mon, 23 Apr 2012 18:15:45 +0100, "Nick"
<nick...@NOSPAM.tiscali.co.uk> wrote:

>A good coat of shellac perhaps. That's all (decent) knotting solution is.

What colour is shellac? Is it what gives knotting solution it's brown
colour?

I found I had a tin of the ronseal in the garage. I must have bought
it to try and forgotten about it. It is water based a white, which is
why I wonder whether it is something other than shellac. The blurb on
the tin talks about advanced polymers etc. but that could just be the
marketing department talking.

I have tried some on the skirting board and architrave; I'll let you
know if it works but you will have to wait three years ;)

The Natural Philosopher

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Apr 30, 2012, 9:31:36 AM4/30/12

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Fred wrote:
> On Mon, 23 Apr 2012 18:15:45 +0100, "Nick"
> <nick...@NOSPAM.tiscali.co.uk> wrote:
>
>> A good coat of shellac perhaps. That's all (decent) knotting solution is.
>
> What colour is shellac? Is it what gives knotting solution it's brown
> colour?
>

yes. Think French polish. (shellac + methylated spirits)

> I found I had a tin of the ronseal in the garage. I must have bought
> it to try and forgotten about it. It is water based a white, which is
> why I wonder whether it is something other than shellac. The blurb on
> the tin talks about advanced polymers etc. but that could just be the
> marketing department talking.
>
> I have tried some on the skirting board and architrave; I'll let you
> know if it works but you will have to wait three years ;)

--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.

stuart noble

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May 1, 2012, 3:38:36 AM5/1/12

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On 30/04/2012 14:31, The Natural Philosopher wrote:
> Fred wrote:
>> On Mon, 23 Apr 2012 18:15:45 +0100, "Nick"
>> <nick...@NOSPAM.tiscali.co.uk> wrote:
>>
>>> A good coat of shellac perhaps. That's all (decent) knotting solution
>>> is.
>>
>> What colour is shellac? Is it what gives knotting solution it's brown
>> colour?
>>
> yes. Think French polish. (shellac + methylated spirits)
>
>> I found I had a tin of the ronseal in the garage. I must have bought
>> it to try and forgotten about it. It is water based a white, which is
>> why I wonder whether it is something other than shellac. The blurb on
>> the tin talks about advanced polymers etc. but that could just be the
>> marketing department talking.
>>
>> I have tried some on the skirting board and architrave; I'll let you
>> know if it works but you will have to wait three years ;)
>
>

Shellac bleaches well, hence the pale polishes and sanding sealers. It
also comes in various shades, garnet being the darkest, almost purple
colour.
Nothing water based is going to seal knots BTW

Fred

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May 3, 2012, 4:29:52 AM5/3/12

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On Tue, 01 May 2012 08:38:36 +0100, stuart noble
<stuart...@ntlworld.com> wrote:

>Nothing water based is going to seal knots

I'm wondering about not bothering with knotting solution in the future
and using aluminium primer for everything instead!

stuart noble

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May 3, 2012, 3:36:12 PM5/3/12

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I don't know how resistant that is to the resin that bleeds out of knots

Fred

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May 4, 2012, 5:37:52 AM5/4/12

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On Thu, 03 May 2012 20:36:12 +0100, stuart noble
<stuart...@ntlworld.com> wrote:

>
>I don't know how resistant that is to the resin that bleeds out of knots

Oh, perhaps I've got that wrong then, I thought it was supposed to
stop knots. I thought it had the advantage of being a knotting
solution and primer all in one coat, and it's solvent based too. IIRC
water based primers can raise the grain. TIA

stuart noble

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May 4, 2012, 6:03:38 AM5/4/12

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You may be right. When I said I didn't know.....:-)

Rick Hughes

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May 4, 2012, 6:24:45 AM5/4/12

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any time I have used knotting solution it has been a dark brown colour
... what you are doling is putting shellac over a knot to stop the know
bleeding.