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05-23-2017, 09:56 AM
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#1
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Guru
Join Date: Nov 2009
Posts: 649
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Caulking vs. rubber gasket
I need to re-install all my deck filling caps and I realised the ones for the diesel tanks had a rubber gasket instead of caulk. They are worn out and broken but it made me think I could by a sheets of rubber gasket material and do them all with this material instead of messing with caulking. Any thoughts on this or previous experience?
Here's what I have in mind:
https://www.acklandsgrainger.com/en/...=searchResults
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05-23-2017, 11:09 AM
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#2
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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Personally, I would use butyl tape if you can tighten it up enough to compress it.
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05-23-2017, 11:18 AM
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#3
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Guru
City: Concrete Washington State
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 18,738
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Caulk can conform to much more irregularities so would use caulk.
But if the surface is nearly flat or flat almost anything will do. Many or most of the gaskets on car engines are paper.
__________________
Eric
North Western Washington State USA
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05-23-2017, 11:48 AM
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#4
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Guru
City: Quebec
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 4,374
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I redid the caulking of an air intake and water filling and used both. I made a thin rubber gasket to go between the fitting and the hull and used caulking on both side of the rubber to be sure it will be tight and dry. May be a total overkill but it has not leaked a drop since .
L.
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05-23-2017, 12:09 PM
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#5
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Guru
Join Date: Nov 2009
Posts: 649
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Quote:
Originally Posted by Nomad Willy
Caulk can conform to much more irregularities so would use caulk.
But if the surface is nearly flat or flat almost anything will do. Many or most of the gaskets on car engines are paper.
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I just redid my entire deck so new fiberglass. Flat and smooth! I just went to the autostore and bought a sheet or gasket material. Cork on one side and rubber on the other one.
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05-23-2017, 12:54 PM
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#6
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Guru
City: Kilmarnock VA
Vessel Name: Wandering Star
Vessel Model: PSN40
Join Date: Apr 2016
Posts: 1,393
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Id prefer a quality caulk instead of a gasket but thats me. I hope you're still going to use a caulk/sealant in the fastening hardware that hold the deck fill down. Gasket material wont stop water intrusion at the screw holes.
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05-23-2017, 01:20 PM
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#7
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Guru
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
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I am a fan of butyl tape but check to make sure it is not attacked by the fuel you are using. Permeates would be a good candidate if butyl tape doesn't work. Please, no silicone (Sorry RT, I had to say that word!).
__________________
Don't believe everything that you think.
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05-23-2017, 02:25 PM
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#8
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Moderator Emeritus
City: SEWARD ALASKA
Vessel Name: DOS PECES
Vessel Model: BAYLINER 4788
Join Date: Feb 2011
Posts: 6,263
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For deck fittings like fuel, water and the like I consider them to be lifetime installations.
Because of that I seal them using 5200 fast cure.
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05-23-2017, 03:21 PM
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#9
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Guru
City: Pender Harbour, BC
Vessel Name: Gwaii Haanas
Vessel Model: Custom Aluminum 52
Join Date: Sep 2013
Posts: 3,791
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Permatex... spell checked into the boards.
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Don't believe everything that you think.
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