Hi

I have just fitted a new stone resin shower tray, with top access trap.

I used a bead of white silicon on top of the rubber washer and under the 
screw-down waste outlet. I checked for leaks and found none, however I was 
concerned that the silicon used was not the right type as it seemed a bit 
'thin'.

I took the waste/trap out again and the 'silicon' was just a runny white 
mess.

Is there a particular type of silicon sealant I should use for this?

Thanks


---
MikeR

MikeR wrote:

> Hi
>
> I have just fitted a new stone resin shower tray, with top access trap.
>
> I used a bead of white silicon on top of the rubber washer and under the
> screw-down waste outlet. I checked for leaks and found none, however I was
> concerned that the silicon used was not the right type as it seemed a bit
> 'thin'.
>
> I took the waste/trap out again and the 'silicon' was just a runny white
> mess.
>
> Is there a particular type of silicon sealant I should use for this?
> 
> Thanks
> 


Yes, the one with an e at the end ;-)

MBQ

On Wed, 21 Sep 2005 14:47:40 +0100, "MikeR" 
wrote:


>Hi
>
>I have just fitted a new stone resin shower tray, with top access trap.
>
>I used a bead of white silicon on top of the rubber washer and under the 
>screw-down waste outlet. I checked for leaks and found none, however I was 
>concerned that the silicon used was not the right type as it seemed a bit 
>'thin'.
>
>I took the waste/trap out again and the 'silicon' was just a runny white 
>mess.
>
>Is there a particular type of silicon sealant I should use for this?
>
>Thanks
>
>
>---
>MikeR
>


Are you sure it WAS silicone ( and not some sort of decorators caulk)
as silicone goes off and becomes fairly hard /flexible state.
You get silicone designed for sanitary work .Not sure what any
difference may be but probably has mould preventing specs.
Stuart 




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Shift THELEVER to reply.

In article , 
mr@REMOVEmregan.co.uk says...

> Hi
> 
> I have just fitted a new stone resin shower tray, with top access trap.
> 
> I used a bead of white silicon on top of the rubber washer and under the 
> screw-down waste outlet. I checked for leaks and found none, however I was 
> concerned that the silicon used was not the right type as it seemed a bit 
> 'thin'.
> 
> I took the waste/trap out again and the 'silicon' was just a runny white 
> mess.
> 

Are you sure it's not silicone grease that you've got?  That's 
waterproof, so good for assembling taps, waterpumps etc. but obviously 
it doesn't go solid.

manatbandq@hotmail.com wrote:

> 
> Yes, the one with an e at the end ;-)


And smells strongly of vinegar.

Regards

Mark

On Wed, 21 Sep 2005 15:06:39 +0100, Stuart  
 wrote:


> Are you sure it WAS silicone ( and not some sort of decorators caulk)
> as silicone goes off and becomes fairly hard /flexible state.
> You get silicone designed for sanitary work .Not sure what any
> difference may be but probably has mould preventing specs.


They are both formulated with a fungicide. The only one that isn't is  
aquarium grade because fish are very sucseptible to biocides. Heaven help  
you if the Environment Agency and DEFRA catch you after letting biocide  
get into a waterway. Quite a few years ago my then company was pilloried  
for about 100 litres of PVA into a canal. PVA is not toxic to fish, but it  
created a bloody great white slick leading to our wharf. HDQ.

John Schmitt

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MikeR wrote:


> I have just fitted a new stone resin shower tray, with top access trap.


I'd use Plumber's Mait for this, not silicone. Stickier and non-setting.

"MikeR"  wrote in message 
news:1127310465.20392.0@nnrp-t71-03.news.uk.clara.net...

> Hi
>
> I have just fitted a new stone resin shower tray, with top access trap.
>
> I used a bead of white silicon on top of the rubber washer and under the 
> screw-down waste outlet. I checked for leaks and found none, however I was 
> concerned that the silicon used was not the right type as it seemed a bit 
> 'thin'.
>
> I took the waste/trap out again and the 'silicon' was just a runny white 
> mess.
>
> Is there a particular type of silicon sealant I should use for this?
>
> Thanks
>
>
> ---
> MikeR
>


Use Plumbers Mait (sp?) rather than silicone. It's like the putty that you 
use in windows - simply roll out a sausage of it in your hands, place round 
the waste hole, put the waste back in and Bob's your uncle.

Mogweed.

MikeR wrote:

> Hi
>
> I have just fitted a new stone resin shower tray, with top access trap.
>
> I used a bead of white silicon on top of the rubber washer and under the
> screw-down waste outlet. I checked for leaks and found none, however I was
> concerned that the silicon used was not the right type as it seemed a bit
> 'thin'.
>
> I took the waste/trap out again and the 'silicon' was just a runny white
> mess.
>
> Is there a particular type of silicon sealant I should use for this?
>
> Thanks
>
>
> ---
> MikeR


I know this may sound obvious, but did you wait for the silcone to go
off before throwing water into the shower tray?

Stuart wrote:


> Are you sure it WAS silicone ( and not some sort of decorators caulk)
> as silicone goes off and becomes fairly hard /flexible state.


Sounds like heatsink compound !


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MikeR wrote:


> I took the waste/trap out again and the 'silicon' was just a runny white 
> mess.
> 
> Is there a particular type of silicon sealant I should use for this?


Sanitary grade stuff, I suppose; and it will state that it's suitable 
for bathrooms etc on the packaging.  It certainly isn't water-soluble, 
which sounds like it's the case with whatever you've used I'm afraid!

David

MikeR wrote:

> Hi
> 
> I have just fitted a new stone resin shower tray, with top access trap.
> 
> I used a bead of white silicon on top of the rubber washer and under the 
> screw-down waste outlet. I checked for leaks and found none, however I was 
> concerned that the silicon used was not the right type as it seemed a bit 
> 'thin'.
> 
> I took the waste/trap out again and the 'silicon' was just a runny white 
> mess.
> 
> Is there a particular type of silicon sealant I should use for this?
> 
> Thanks
> 
> 
> ---
> MikeR
> 
> 


This sounds like it might have been acrylic bath sealant rather than 
silicone - absolutely dreadful stuff IME. Use plumbers "mait" round the 
waste and silicone around the outside of the tray.

Dave

> I know this may sound obvious, but did you wait for the silcone to go
> off before throwing water into the shower tray?



I'm sure I've read, on the side of a tube of silicone, that lightly
spraying the wet silicone with water will decrease the setting time.

On Wed, 21 Sep 2005 07:02:57 -0700, manatbandq wrote:


> 
> MikeR wrote:
>> Hi
>>
>> I have just fitted a new stone resin shower tray, with top access trap.
>>
>> I used a bead of white silicon on top of the rubber washer and under the
>> screw-down waste outlet. I checked for leaks and found none, however I was
>> concerned that the silicon used was not the right type as it seemed a bit
>> 'thin'.
>>
>> I took the waste/trap out again and the 'silicon' was just a runny white
>> mess.
>>
>> Is there a particular type of silicon sealant I should use for this?
>> 
>> Thanks
>> 
> 
> Yes, the one with an e at the end ;-)
> 

For this application the stuff to use is _little_ silicone grease.
You could also use a little washing up detergent. 
The purpose is to allow the rubber to more easily move into the correct
place for making a sealed. You could probably get away with nothing. 
The seal is between the waste-rubber-sanitarywar. 

Silicone sealant would take a while to set (but it doesn't need to set
to seal IYSWIM) but it does queer the pitch for anyone doing maintenance
on it later on. If I see it in this context the word bodger springs to
mind. 
 

-- 
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk 
Gas fitting FAQ  http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html

MikeR wrote:

> I used a bead of white silicon on top of the rubber washer and under the 
> screw-down waste outlet. I checked for leaks and found none, however I was 
> concerned that the silicon used was not the right type as it seemed a bit 
> 'thin'.
> 
> I took the waste/trap out again and the 'silicon' was just a runny white 
> mess.


How long did you leave it to cure for? It skins over fairly quickly,
but takes some days to fully cure if applied in thickness, or where
the air can't get at it freely.

In message , MikeR 
 writes

>Hi
>
>I have just fitted a new stone resin shower tray, with top access trap.
>
>I used a bead of white silicon on top of the rubber washer and under the
>screw-down waste outlet. I checked for leaks and found none, however I was
>concerned that the silicon used was not the right type as it seemed a bit
>'thin'.
>
>I took the waste/trap out again and the 'silicon' was just a runny white
>mess.
>
>Is there a particular type of silicon sealant I should use for this?
>

It might have gone past it's sell by date - it's not actually silicone, 
but the cheap acrylic ? stuff

I had this problem a few years ago

-- 
geoff

In message , John Schmitt 
 writes

>On Wed, 21 Sep 2005 15:06:39 +0100, Stuart 
> wrote:
>
>> Are you sure it WAS silicone ( and not some sort of decorators caulk)
>> as silicone goes off and becomes fairly hard /flexible state.
>> You get silicone designed for sanitary work .Not sure what any
>> difference may be but probably has mould preventing specs.
>
>They are both formulated with a fungicide. The only one that isn't is 
>aquarium grade because fish are very sucseptible to biocides. Heaven 
>help  you if the Environment Agency and DEFRA catch you after letting 
>biocide  get into a waterway. Quite a few years ago my then company was 
>pilloried  for about 100 litres of PVA into a canal. PVA is not toxic 
>to fish, but it  created a bloody great white slick leading to our 
>wharf. HDQ.
>

Surely, you could have easily plastered over it

-- 
geoff

Mr Fuxit  wrote:

>> I know this may sound obvious, but did you wait for the silcone to go
>> off before throwing water into the shower tray?
> 
> 
> I'm sure I've read, on the side of a tube of silicone, that lightly
> spraying the wet silicone with water will decrease the setting time.


Acetoxy cure (vinegar smell) silicone cures by the replacement of
acetic acid molecules in the silicone with water.
If you want it to set instantly, mix in some slightly damp cement powder.
Less instant the less aggressive the alkali is - I've used bicarbonate of
soda to create lightly foamed silicone set in about 5 mins.

On Wed, 21 Sep 2005 20:18:56 +0100, Mr Fuxit   
wrote:


> I'm sure I've read, on the side of a tube of silicone, that lightly
> spraying the wet silicone with water will decrease the setting time.


This is correct. The silicone sealant is water-catalysed. Once the  
reaction is initiated each coupling of acetoxysilicone releases one  
molecule of acetic acid and one of water, so the reaction is  
self-sustaining. There is a scavenging agent in small quantities to take  
out the odd molecule of water to maintain stability in the tube. In the  
gulf one of our customers was having problems with the near zero humidity.  
Once we told him the trick he went away a happy man and proceeded to buy  
several more container loads of our products.

John Schmitt

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