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Old 07-02-2014, 17:58   #1
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Re-bed Portholes

I need to reseal my portholes on my 1984 Catalina 30. The aluminum on the cabin side of a couple of the portholes also appears to be blistered as well and that seems to be where the leaks are coming from. Do I need to replace the interior part of the porthole with a new frame or is there some kind of epoxy or bonding agent that I can use to repair the aluminum. What kind of material should I use for a gasket? Is there a gasket that is made specifically for this porthole based on year and boat manufacturer? For instance through Catalina Direct or do I hand cut it to fit? Is there a sealant that is used instead? Thanks for any help or directions to various links that might be able to instruct me.
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Old 07-02-2014, 18:22   #2
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Re: Re-bed Portholes

Although this video does not directly apply it may be of some help
Resealing or Rebedding Portlights, Boat Repair, Sealing portlights - YouTube

You may also want to check some of the Catalina owners forums as they will have first hand experience with this.
Good Luck
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Old 07-02-2014, 19:43   #3
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Re: Re-bed Portholes

Butyl tape.
Find it at... Oh just found a thread that may help too.
Prepping for fixed window replacement - SailboatOwners.com
Click on "bed it with butyl tape" link under MainSail's signature.
Good luck!
You will rally like the way that stuff works!
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Old 07-02-2014, 20:18   #4
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Re: Re-bed Portholes

Second the recommendation to use butyl tape. It's a bit more work but does the job and, if done right, you'll never have to do it again.

One caution, if any kind of silicone was used on the ports you will have to do some serious cleaning and sand done to clean glass since the fiberglass absorbs the silicone oil from the old caulk and nothing will stick to it.
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Old 10-02-2014, 11:28   #5
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Re: Re-bed Portholes

Third the recommendation to use butyl tape.
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Old 10-02-2014, 11:38   #6
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Re: Re-bed Portholes

Good advice, been done many, many times by many, many skippers. Google "boat aluminum port (or window) replacement."

Also this:

using Dow Corning 795 Silicone to caulk glass-gasket joint in portlight
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Old 11-02-2014, 17:18   #7
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Re: Re-bed Portholes

Thanks to all who responded with good advice and suggested links to my request for information to re-bed my porthoels.
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