Fixing Leaky Portlights on a Cal 34 - SailNet Community

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  #1  
Old 08-04-2010
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Fixing Leaky Portlights on a Cal 34

I have a beautiful '79 Cal 34 that has two portlights with slow dripping leaks. I'm not looking to completely replace the portlights (yet). Upon inspection of the ports, the panes appear to be okay, but the rubber seal looks shot. Has anyone replaced the rubber seal with luck or can recommend a good fix for these ports?
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Old 08-04-2010
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Measure the gasket and then do a Google search for Neoprene gasket. You should be able to get a small roll of it to replace your current gasket.
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Old 08-13-2010
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does anyone know the size of the portlights on a sabre 28?.. May need to replace one.
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Old 08-13-2010
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before i redid mine (for which i used mostly lexan) as a temp solution i found this to work

Amazon.com: 3/4" X 30' Butyl Tape: Home Improvement

they use it on rvs...i found mine at an rv store.... the nice thing is it is eaisily removeable. i applied it inside and out as to prevent outside leakage getting trapped in by an interior only app...

good luck. leaks suck.
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Old 08-13-2010
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kendoe... when i replaced mine, i took one of each type out to make a pattern. one thing to consider is what you replace it with... IIRC Lexan can expand in the heat so you need to plan accordingly, and needs to be oiled as you cut it or it has a tend. to melt and fuse back to itself.
oh, that lexan also had a tend. to want to 'bow out' so a neat trick is to use popsicile sticks or toothpicks, jam them inbetween the lexan and the frame to kinda force help the adhesive 'suck' it in, then just yank em out later.... good luck
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Last edited by QuickMick; 08-13-2010 at 03:14 PM.
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Old 08-13-2010
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I would highly recommend you not use polycarbonate for new ports. Use cast acrylic instead. It is more UV resistant and more scratch resistant and far less likely to leak. Polycarbonate isn't really well suited for ports, since it can distort enough under impact to break the sealant's bond to it.

BTW, if the ports are deadlights, they should probably be bedded in either Sikaflex 295 or Dow Corning 295 Silicone structural adhesive. Using anything else is a mistake IMHO.
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Old 08-13-2010
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Dog...as always... makes a great point... polycarbonate is highly sensitive to scratching and will not take to any cleaner well--'cept soap and water. Part of the decision for me was what kind of impact i would reasonably expect them to encounter... inland freshwater (30k acres, not the great lakes) vs offshore etc etc. oh, and i happened to have a buddy who is a glazier who gave me the material and let me use his shop.....
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