Mealting black seal inside double glazed unit.


Postby carpenter » Wed Apr 14, 2010 2:24 pm

We have installed new double glazed units in timber windows approximately twelve months ago. We now find that the black bitumine inner seal is melting in blobs on some of the units, could you please tell me if you have come accross this problem before and tell me what may have caused this to happen.
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Postby stoneyboy » Thu Apr 15, 2010 10:09 pm

carpenter,
If you used putty to seal in the windows then the solvents in the putty are dissolving the glazing sealant.
end
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Postby carpenter » Fri Apr 16, 2010 7:45 am

stonyboy,

Arborsealtape and a nuteral cure silicone was used to fit the units in the timber windows.
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Postby carpenter » Fri Apr 16, 2010 7:48 am

stoneyboy wrote:carpenter,
If you used putty to seal in the windows then the solvents in the putty are dissolving the glazing sealant.
end


Arborseal tape and a nuteral cure silicone was used to fit the units into the windows.
carpenter
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Joined: Wed Apr 14, 2010 2:15 pm


Postby stoneyboy » Sat Apr 17, 2010 2:16 pm

carpenter,
In that case the units are faulty - get the supplier in to have a look. DGUs in timber windows generally have a 5 year guarantee.
end
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Postby trond » Mon May 03, 2010 10:24 am

Google "tremco-illbruck.co.uk/celumdb/documents/Sealant_Compatibility_Bulletin_GB_10437.pdf"

Have a read of this.It's a useful and detailed document on the subject.

It's not a unit fault at all, but a silicone issue. 'neutral cure' or seeing the use of 'glazing' on it isn't a rubber stamp of suitability.. There's so many silicones now full of additives, fillers, anti-fungals etc that cause real damage to DGU's up and down the country.
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Postby gemmadoc » Fri Oct 14, 2011 5:42 pm

Hi. I was wondering did you ever resolve the issue of your melting seal in the units. I am having the exact same problem at the minute.
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Joined: Fri Oct 14, 2011 5:32 pm


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