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Old 12-26-2017, 06:31 PM   #1
City: Yorktown, VA
Vessel Name: Red Eagle
Vessel Model: 1995 GB 42 Classic
Join Date: Dec 2017
Posts: 16
New Member with leaking GB42 cabin window.

I am the owner of a 1995 GB42 Classic which we keep at Whitehouse Cove Marina in Poquoson, VA. We took “Red Eagle” around the Great Loop in 2015 and are planning the Downeast Loop this year.

I am currently replacing a leaking window in the aft cabin head. I have removed the exterior teak trim, the moveable and fixed glass, and the window track. The new track and glass are on order, but I don’t know what type of caulk to use to glaze the fixed window to the teak exterior trim and to seal the exterior trim to the fiberglass and track. The caulk I removed to get the window out was white, paintable and still flexible after 22 years. Looking for something similar.
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Old 12-26-2017, 06:59 PM   #2
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City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 18,056
I like buytl tape.
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Old 12-26-2017, 07:27 PM   #3
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City: Bellingham, WA
Vessel Name: Excellent Adventure
Vessel Model: 1995 Jefferson Ker Shine 45
Join Date: Apr 2015
Posts: 395
buytl tape
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Old 12-26-2017, 08:10 PM   #4
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City: Myrtle Beach, SC
Vessel Name: Bottomtime III
Vessel Model: 1974 Fales 32 Navigator
Join Date: Oct 2015
Posts: 55
I used buytl tape and sikaflex last week to mount 2 new windows. It took 3 days to tighten really tuff stuff.

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Old 12-27-2017, 07:35 AM   #5
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City: Quebec
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 4,277
Redis my aft cabin window caulking using sikaflex 291 LOT. No a leaking drop since and we are ranging from -35 to +35 celsius during the year. Not difficult to apply but keep a pile of rag nearby. If you put some where it should not go use WD40 cleaner degreaser or some spray nine to easily remove it.

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Old 12-27-2017, 01:53 PM   #6
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City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
Your windows were bedded with dolfinite, probably. That was the go-to caulking compound for GB in its day but eventually, like all good things, it goes south. Dolfinite works but is hard to find and is unfashionable like red lead (although there is nothing anti-human in it). I, like others have stated, have started using butyl tape for everything that needs sealing (except for oil and fuel). Its easy to use (unless it contacts itself!) and comes in different widths and black or grey. Buy it at a glass shop and get lots for all the other stuff you will use it on. Use the wide stuff for hatches and large areas and the narrow for small stuff. Kinda obvious but it might save you another trip to the glass store.

Pick a glass shop because they have to stand behind their work and won’t buy crappy supplies like buying it on eBay.

Some of the tape will ooze out under pressure, just cut it and peel it and plan to return later to check any fasteners you have tightened.

It also sticks to your clothes and your skin, just like poop to a blanket so be prepared to wear the proper old clothes and gloves.
Don't believe everything that you think.
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Old 12-27-2017, 06:13 PM   #7
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City: North NJ
Vessel Name: Bassey
Vessel Model: 17' Bass
Join Date: Aug 2016
Posts: 378
I found buytl tape at a local RV store. Worked real well when I had to do a hatch on my old Aquarius. Nice to use and seals real well.
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Old 12-27-2017, 07:21 PM   #8
City: Chicago/Montrose Harbor
Vessel Name: Sea Jay
Vessel Model: Non Trawler ;-) Ask me if it matters LOL
Join Date: Jun 2016
Posts: 512
Compass Marine carries its own butyl tape that other TFers have tested and love
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Old 12-27-2017, 07:40 PM   #9
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City: Gibsons, B.C., Canada
Vessel Name: Island Pride
Vessel Model: Palmer 32'
Join Date: Oct 2007
Posts: 4,116
I bought and use COmpass Marine's tape. Have to buy more this year.
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Old 12-27-2017, 09:04 PM   #10
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City: Cowiche, WA
Join Date: Sep 2011
Posts: 660
I own a 1974 GB 36 and rebedded with Dolphinite. Tried butyl tape but it did not compress to seal as well as the Dolphinite did. Consistency is like very thick sticky peanut butter. Take your time when applying it and it squeezes out nicely to ensure a good seal.
Keith Olive
1974 Grand Banks 36-427
Vashon Island, WA
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Old 12-28-2017, 12:02 PM   #11
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City: Cowiche, WA
Join Date: Sep 2011
Posts: 660
Hello Sax,

Step one, go to the Grand Banks Owners Resources site and join if you haven’t already. Grand Banks Owner's Resources

Here are some links I have bookmarked for when I did this project for those considering doing the same.

Here are some links I have bookmarked that will help you I think.

This is a good set of instructions from Marin.

Take your time and you will be happy with the finished product.
Keith Olive
1974 Grand Banks 36-427
Vashon Island, WA
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window caulk, window leak

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