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Portlights and Portlight Gaskets  

December 1, 2010. This subject got moving when Bruce Evans, Yankee #236 raised a question on replacement gaskets for his boat. Jonnie Walker, who is in the middle of a major restoration of his Madalyn Joy, Yankee #227, responded with what he is doing for his boat, including pictures. There are, no doubt, a few ways to skin this cat and we'll post them here as we find out about them..

First, here is Bruce's email regarding portlight gaskets, excerpted, monor edits.

Yankee seems to have used a gray molded, rubber-like material. Maybe I should give up trying to find an identical or similar molded shape and replace with flat gaskets made from sheet material. I suspect I am not alone on this one, and feel foolish reinventing something that has been previously solved - and by some pretty good craftsmen it appears from the site.

This is what Jonnie is doing (minor edits)

Hi Ron,

I saw the request about portlight gaskets. That rubber gasket material is called "Marine Glaze". There is no telling who originally made it, or who would make a similar one.

The best thing I can suggest, IF the owner wants beyond all else to keep it original, is to contact Blain, https://www.blainewindow.com/ and send them a sample - they should be able to match it up.

 HOWEVER: there is a better way....


I am almost done with Madalyn Joy's new glass....(If I had not broken one putting it in I'd be done). I took out the old glass, cut new green laminated glass, bead blasted the aluminum frames, filled the channels with GE silicone 2 (any good silicone is fine), set the glass and clamped to keep the frames even.

Once the silicone was cured I used a razor blade to trim it and clean the glass. I did not put in the riveted connectors...only silicone. Both glass and aluminum are excellent sub-straits for silicone. I don't use silicone for deck hardware, or anything else on a boat.....but for this it is excellent.


As I said I broke one of the windows.....it took me over half an hour to get the broken one out of the frame.

In this picture of the broken portlight you can see how it looks clean.

I have one more project to get done (non-boat) and then next week will get back to working on her....I'll get some pics of the ports back in...some of the wood is back on her as well.


Be sure to check out the other pages we have on Portlights in the Technical Section




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