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post #1 of 8 Old 04-24-2007 Thread Starter
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Acrylic window sealer

Putting new windows in Ossifrage. The windows are acrylic, will be slightly inset and held lightly with mechanical fasteners. What sealant/adhesive product have others had +++ success with?

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post #2 of 8 Old 04-24-2007
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I would use Boatlife LifeSeal or 3M 4200, which are both polyureathane-based sealants. However, be aware that neither BoatLife LifeSeal or 3M 4200 stick well to teak. Other ways to do it are to use neoprene gaskets or butyl rubber-based window sealant tapes.

I would avoid polysulfide-based sealants, like BoatLife LifeCalk, as they tend to be a bit more reactive and while good for bedding hardware, will tend to attack plastics, like ABS, Lexan and Acrylic/Plexiglass.

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post #3 of 8 Old 04-24-2007
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You may also want to look into butal sealent the kind that is used for auto windshields.

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post #4 of 8 Old 04-24-2007 Thread Starter
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Are butyl sealants at all adhesive or need I rely on the mechanical (through bolt) fasteners?

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post #5 of 8 Old 04-24-2007
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Boatlife works well with teak if you use their primer specifically for teak. The primer is expensive ($16.00 or more for a half pint or so) but works very well.
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post #6 of 8 Old 04-24-2007
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Quote:
Originally Posted by dvpamenter
Are butyl sealants at all adhesive or need I rely on the mechanical (through bolt) fasteners?
Depends on the exact sealant you're using, but most of the butyl tape sealants are fairly sticky IIRC.

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post #7 of 8 Old 04-24-2007
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I've been leak free (rain, hose, & lake, no salt) for a couple months with good ole GE Silicone II. $4 per tube from HomeDespot. Plexiglass to vinyl frames and fiberglass hull.

Just throwing it out there, not saying it's proper. My boat is a dingy with windows.

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post #8 of 8 Old 04-24-2007
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I use the same thing, but in combination with a new version of the original C&C/CS gasketing. Silicone (clear) worked all last year with nary a drop and we took some green water amidships (not a lot, but enough to show any caulking shortcomings!)
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