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Deck floor seal on 25 ft?

 
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jkswor



Joined: 23 Jun 2011
Posts: 148
City/Region: tok
State or Province: AK
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: Missy marie
PostPosted: Thu Aug 24, 2017 5:31 pm    Post subject: Deck floor seal on 25 ft? Reply with quote

So I just bought this 07 c dory 25 ft cruiser
The deck and bilge doors are sealed with caulking of some sort
However water is getting past the seal
1. Is the deck supposed to be sealed with caulking
There is black mold in several areas. I am removing the deck to see if gas tank area is full of water and mold
2 how to reseal it and the bilge access doors so it does not leak
Jim
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thataway



Joined: 02 Nov 2003
Posts: 20779
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Thu Aug 24, 2017 6:24 pm    Post subject: Reply with quote

Yes, it is a good idea to inspect the bilge and replace the caulk around the deck. You will most likely find that there is both mold and water in that area. Be cautious that there is no damage done to the tank with chlorine products. The tank is open to the bilge, and water is going to flow into that area. Also inspect the tank. One member is currently replacing the tank where wood rested against the aluminum and apparently caused pin holes. Would it be worth pulling the tank and coating it properly? Expensive, but perhaps down the road it might save a much higher cost.

I would probably use Boat Life Life Seal as the best sealant. Next would be 3M 4000. Both will give a good seal, but the Boat Life will be easier to remove in the future.

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Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
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Home port: Pensacola FL
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kaelc



Joined: 19 Jul 2017
Posts: 411
City/Region: Saanich
State or Province: BC
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: Island Magic
Photos: Stil-Afloat
PostPosted: Tue Apr 30, 2019 9:56 pm    Post subject: Reply with quote

What did you end up using or did anyone else use? What did you use to clean off the old caulking? Thanks about to tackle this!
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jkswor



Joined: 23 Jun 2011
Posts: 148
City/Region: tok
State or Province: AK
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: Missy marie
PostPosted: Wed May 01, 2019 9:38 am    Post subject: Reply with quote

I replaced the leaking hatches. There is a thread on this replacement.
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jkswor



Joined: 23 Jun 2011
Posts: 148
City/Region: tok
State or Province: AK
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: Missy marie
PostPosted: Wed May 01, 2019 9:52 am    Post subject: Reply with quote

Cdory 25 deck hatch installation. Is the topic
There is no way to seal existing deck hatch on a cdory 25
I tried everything nothing worked for me except replacement
Hatch cost about $120 each. Piece of cake to install
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journey on



Joined: 03 Mar 2005
Posts: 3593
City/Region: Valley Centre
State or Province: CA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: journey on
Photos: Journey On
PostPosted: Wed May 01, 2019 1:05 pm    Post subject: Reply with quote

I replaced the deck sole hatches on Journey On, which now makes for a dry bilge. Here's a description: Hatch Installation

I also removed the fuel tank cover and inspected the tank and mounting. The deck cover is both screwed and sealed, so removing it was a bear. Here is the story of Alyssia Jean who had to replace the tank and Journey On who just inspected the tank: Removing Tank Cover. Good pictures.

The aft bilge and tank compartment are joined, so that when there is water in the bilge, it is also in the tank compartment. That's why I was so happy that after the hatch replacement, the bilge was dry.

Boris
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thataway



Joined: 02 Nov 2003
Posts: 20779
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Wed May 01, 2019 9:07 pm    Post subject: Reply with quote

kaelc wrote:
What did you end up using or did anyone else use? What did you use to clean off the old caulking? Thanks about to tackle this!


The hatch issue I believe is answered--Bori's thread on this is excellent.
I tried various materials to clean the sealant--not really successful. I tried several solvents, and abrasive (Mr. Clean type) of pad.
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localboy



Joined: 30 Sep 2006
Posts: 4656
City/Region: Lake Stevens via Honolulu
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: 'Au Kai (Ocean Traveler)
Photos: 'AU KAI
PostPosted: Sat May 04, 2019 4:06 pm    Post subject: Reply with quote

The factory hatches leak. Period. I just changed them out at the end of last season with new hatches with rubber seals, as others have referenced here. We shall see if they are watertight.

My advice would be to remove, undercut and epoxy all the access ports, steps etc. They are all balsa cored (deck & steps) and were not sealed at all in our 2007. Once you re-seal all the ends with epoxy, re-bed with new sealant. I can't remember is if I used 4000 or 4200; whichever is more UV stable is what I used. I did it all last year. Pics in my album if you need a reference.

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