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PostPosted: Sun Nov 27, 2016 10:14 pm 
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Hi

As part of my cladding in metal sheeting of my loft extension I fitted a gutter made out of the same material. When drilling out the drain hole I used a cheap and nasty hole saw that just scoured a few thou of the metal before going blunt leaving a nasty gouge in the sheeting.

I used a better saw next but it was smaller and left the gouge area exposed. As it removed the zinc coathing I smeared clear silicon sealant over the area to try and prevent rusting. But now thinking that while I have access perhaps I should paint the whole inside of the gutter with say a bitumastic paint.

Now my concern is that there are various sections smothered in silicon. So should I remove it or can I just lather the whole lot in the bitumastic paint?

Cheers Tim


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PostPosted: Mon Nov 28, 2016 7:29 pm 
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Remove it, it'll be easier in the long run. You may get the bitumen to coat over it but it won't stick and it'll be the first point if failure in future.

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PostPosted: Mon Nov 28, 2016 9:45 pm 
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I'd remove it and apply something like Flexocryl. It is a paint that contains glass fibre strands that will bridge any of the damaged surface.

I got the tip from somebody on here. Can't remember who. :? I've used it in a variety of (water related) applications, and it certainly 'does the job'.

You just need to 'stir it well' and then 'stir it weller' and then 'stir it wellist' and then....................... :wink:


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PostPosted: Tue Nov 29, 2016 11:51 am 
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Many thanks

Will scrape of all silicon and use something like Flexacryl to seal the inside of the whole gutter.


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