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Old 23-03-2016, 05:30   #1
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Steel Yacht Windows

Hi all, I am after some feedback, I have a Steel John Pugh Winsong Yacht, she is 25 yo and the original windows were 10mm lexan bolted to the hull from the inside. Obviously water penitrated the screw holes and caused rusting issues see picture attached. I have removed the rust, reinforced the window frames for strength and to assist in fit out. I also intend to use a 2400 mm x 300mm panel of 6mm tinted Acrilic/Lexan, fixing the windows from the outside covering 3 windows with the one panel. They will be bonding with 3M brand tape 'VHB 4991' and bedded on the painted hull with Dow Corning brand, silicone # 791. There will be no penetrating bolts through the hull.
See Pictures attached.
Is there anything I should be aware or concerned about?
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Old 23-03-2016, 06:51   #2
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Re: Steel Yacht Windows

DOW CORNING 791 Silicone Weatherproofing Sealant is a one-part, medium modulus, neutral-curing silicone sealant for general weathersealing applications, designed and intended to weatherseal building joints and should never be used as structural glazing adhesives.
https://www.dowcorning.com/content/p...2-0979c-01.pdf
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Old 23-03-2016, 07:36   #3
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Re: Steel Yacht Windows

Although it may look more sexy...the 2400 long lens will create a problem with the expansion rate differential...IIRC plexi expansion can be as much as a 1/16" per foot, over normal temp range. Steel not so much...


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Old 23-03-2016, 13:52   #4
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Re: Steel Yacht Windows

Thanks Gord I was going off this article? I will email Dow.
Cheers


How to install boat windows and port lights
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Old 23-03-2016, 13:55   #5
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Re: Steel Yacht Windows

Thanks Captcook, that confirmed my concerns I will now look at smaller individual windows.... I only want to do this Once :-/
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Old 31-03-2016, 02:06   #6
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Re: Steel Yacht Windows

Now going with individual windows.

Thanks for all the replies.
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