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Re: [PSUBS-MAILIST] Shrinkage of plexi windows.

Hi, Shelley . . .
 
I'm coming in on this late so I may be off-base.  There's something about SikaFlex that rings alarm bells in my head.  It's a fantastic boatbuilding goop but, for viewports, I don't think you want something that flows under pressure.  Again, you may have done all the research required and SikaFlex may be fine.
 
I believe O-rings in grooves are the way to go.  Some of the pros may have opinions on this.
 
Years ago I uploaded images of O-rings under pressure/deformation to the PSUBS site.  I can't find any of my uploads but I'm sure they're still in there somewhere.
 
Cheers
Rick in Vancouver
 
 
 
----- Original Message -----
Sent: Sunday, March 29, 2009 6:55 PM
Subject: Re: [PSUBS-MAILIST] Shrinkage of plexi windows.

Thanks Jon. A little more gap would be acceptable, but not much more. I'm kinda picky on things fitting right.
I'll be using polyurethane (Sika) so it's probably not that critical, but I definitely don't want them to be sloppy.
I'll keep everybody up on what happens through the process, and maybe I'll give Greg a call. He's done it before and may be able to give me a good estimate of how much shrinkage to expect. Thanks for looking that up. Frank D.

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