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Portlight gasket replacement on CB35

Posted: Mon Jun 13, 2022 9:59 am
by Rondo
Like most more recent CB vessels, our 2007 CB 35 has six lovely SS opening portlights in the forward cabin. 83.3% of them are not leaking. The one, leaking a lot. I have determined that these most likely are "Passage Series" by Bomar. I can see that the rubber gasket material has deteriorated and pulled away from the outer frame, so a leak is no surprise. This is understandably due to exposure to 14 or 15 years of UV exposure to the Florida sun. A call to Bomar finds that they do have this material available. It is pricey at $12 per foot, plus some kind of environmental surcharge of 15%. This appears to be a custom extruded rubber product, so no good options, unless someone here can steer me to something that works. Anyone out there that has successfully done this?
Rondo

Re: Portlight gasket replacement on CB35

Posted: Mon Jun 13, 2022 1:16 pm
by Pitou
Well you've done better than I when I eas rebedding one of my Passage series ports a couple plus years ago when Bomar told me that they did not provide gasket material for their portlights, leaving it to the installer to choose what's best for their install.

I used butyl tape which I use for almost all above waterline bedding and it worked great for the rebedding of my Passage Series portlght as well. Amazon has a tone of it and this looks similar to what I had gotten a few years back from Compass Marine, but Compass is no longer selling product.

https://www.amazon.com/GSSI-Sealants-Bu ... r=8-5&th=1

Re: Portlight gasket replacement on CB35

Posted: Mon Jun 13, 2022 11:10 pm
by Rondo
THanks for the tip. If I end up removing the port for rebedding it will be handy. However, i am pretty sure the leak is due to decomposition of the rubber gasket inside. It appears that I can remove the old rubber and replace whihout removing it from the boat. The leak clearly coming from between the glass and the gasket. I have found something I think has a chance of solving the issue. I'll post if it works.
Rondo

Re: Portlight gasket replacement on CB35

Posted: Mon Jun 20, 2022 7:23 pm
by Rondo
I tracked down the right rubber extrusion for the Bowmar portlight seals. It is part number S-217. It is sold by the foot, has an aggressive peel & stick adhesive, so you only need to glue the ends together. I found it in stock at Fawcett Boat Supplies in Annapolis. $13 per foot.
Rondo

Re: Portlight gasket replacement on CB35

Posted: Mon Jun 20, 2022 8:41 pm
by Pitou
Rondo wrote: Mon Jun 20, 2022 7:23 pm I tracked down the right rubber extrusion for the Bowmar portlight seals. It is part number S-217. It is sold by the foot, has an aggressive peel & stick adhesive, so you only need to glue the ends together. I found it in stock at Fawcett Boat Supplies in Annapolis. $13 per foot.
Rondo
Thanks for sharing this.

Posted: Mon Jun 20, 2022 10:27 pm
by Nancy
Great info - thank you!