I was wondering if anyone knows what the lifespan of clear silicone 
sealant is when exposed to UV (i.e. south facing aspect)? I am thinking 
of ordinary builders stuff used externally here rather than anything 
special.

TIA,

Alex.

On Tue, 06 Sep 2005 08:30:02 +0100, AlexW  wrote:


> I was wondering if anyone knows what the lifespan of clear silicone  
> sealant is when exposed to UV (i.e. south facing aspect)? I am thinking  
> of ordinary builders stuff used externally here rather than anything  
> special.


I believe the normal manufacturers' warranty is 10 years. Experience would  
suggest that this is rather conservative, to my knowledge no RTV silicone  
has failed in normal service since its invention about fifty years ago.

John Schmitt

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John Schmitt wrote:

> On Tue, 06 Sep 2005 08:30:02 +0100, AlexW  wrote:
> 
>> I was wondering if anyone knows what the lifespan of clear silicone  
>> sealant is when exposed to UV (i.e. south facing aspect)? I am 
>> thinking  of ordinary builders stuff used externally here rather than 
>> anything  special.
> 
> 
> I believe the normal manufacturers' warranty is 10 years. Experience 
> would  suggest that this is rather conservative, to my knowledge no RTV 
> silicone  has failed in normal service since its invention about fifty 
> years ago.
> 
> John Schmitt
> 


Thanks John...

Pretty resilient then.

FYI: unibond's site quotes 35 years, but I was not sure if this was for 
higher performance stuff.

Cheers,

Alex.