Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-23-2017, 04:15 PM   #1
Senior Member
 
City: Oriental
Country: USA
Vessel Name: Delphina
Vessel Model: President 43
Join Date: Aug 2014
Posts: 236
glue

I am going to replace some rotten plywood in the aft cabin bulk head, which type of glue should I use to adhere the plywood to the fiberglass bulk head . thank you
__________________
Advertisement

KEVMAR is offline   Reply With Quote
Old 12-23-2017, 04:20 PM   #2
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 7,618
If you're not ever going to remove it, construction adhesive in a caulk tube such as Liquid Nails would be my choice.

Ted
__________________

__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is offline   Reply With Quote
Old 12-23-2017, 04:54 PM   #3
Guru
 
Lou_tribal's Avatar
 
City: Quebec
Country: Canada
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 3,516
Quote:
Originally Posted by KEVMAR View Post
I am going to replace some rotten plywood in the aft cabin bulk head, which type of glue should I use to adhere the plywood to the fiberglass bulk head . thank you
Epoxy
Lou_tribal is offline   Reply With Quote
Old 12-23-2017, 06:15 PM   #4
Senior Member
 
City: Washington
Country: US
Join Date: Nov 2017
Posts: 467
I'm going with the construction adhesive unless you post more details or a reason it wouldn't be the best choice.

If you go to the home enter, you will find about a dozen different brands and types of construction adhesive. Read the labels and decide which would be best for your project. Water resistant or "outdoor" would be good things to look for.
aboatman is offline   Reply With Quote
Old 12-23-2017, 06:29 PM   #5
TF Site Team
 
Larry M's Avatar
 
City: JAX, FL
Country: USA
Vessel Name: Hobo
Vessel Model: Krogen 42-120
Join Date: Nov 2008
Posts: 7,921
I’ve always glassed in plywood to fiberglass using either polyester resin or epoxy.

Did you just cut out a piece/small section or do you need to tab a piece in?

I don’t mean to offend you but I’ve never heard of using construction adhesive as a proper fix on a boat.
Larry M is offline   Reply With Quote
Old 12-23-2017, 08:25 PM   #6
Guru
 
twistedtree's Avatar
 
City: Gloucester, MA
Country: USA
Join Date: Jan 2013
Posts: 4,947
If it's a repair to a bulkhead then presumably you want to restore as much of it's structural integrity as possible. I think that calls for epoxy and glassing it in as thoroughly as possible.
__________________
www.MVTanglewood.com
twistedtree is online now   Reply With Quote
Old 12-23-2017, 10:42 PM   #7
Guru
 
City: Port Townsend
Country: North America
Vessel Name: The Promise
Vessel Model: Roughwater 35
Join Date: Sep 2012
Posts: 1,563
dhmeissner is offline   Reply With Quote
Old 12-23-2017, 11:27 PM   #8
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 7,618
Quote:
Originally Posted by KEVMAR View Post
I am going to replace some rotten plywood in the aft cabin bulk head, which type of glue should I use to adhere the plywood to the fiberglass bulk head . thank you
Ok, I may be misunderstanding this, but this sounds the plywood is the final surface and not being glassed over it. If the plywood will be covered with fiberglass and is structural, I would use West System thickened with their white bonding powder.

Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is offline   Reply With Quote
Old 12-24-2017, 02:19 AM   #9
Guru
 
Simi 60's Avatar
 
City: Queensland
Country: Australia
Vessel Model: Milkraft 60 converted timber trawler
Join Date: Jul 2016
Posts: 2,210
Why and how did it rot.
Fix that problem first.
If its a structural repair use epoxy
If cosmetic liquid nails or sika or epoxy
Simi 60 is offline   Reply With Quote
Old 12-24-2017, 07:02 AM   #10
FF
Guru
 
FF's Avatar
 
Join Date: Oct 2007
Posts: 19,751
Epoxy is a glue ,

polly resin is for building GRP boats .

It sticks to wood a bit better than tape, but is not structural.

Stuck on plywood outside with some glass it can make the ply more water resistant ,

but any/every penetration is a danger and needs to be re bedded on a sked..
FF is offline   Reply With Quote
Old 12-24-2017, 09:16 AM   #11
Senior Member
 
City: Oriental
Country: USA
Vessel Name: Delphina
Vessel Model: President 43
Join Date: Aug 2014
Posts: 236
I am in the process of replacing the aft window that had been leaking for many years .and the plywood was rotten and soaked if I could figure how to post a pic I would .,,
KEVMAR is offline   Reply With Quote
Old 12-24-2017, 09:35 AM   #12
Senior Member
 
City: Washington
Country: US
Join Date: Nov 2017
Posts: 467
It seems this is a case of "If you want the right answer you have to ask the right question."

If this is structural, not cosmetic or decorative, I would change my answer to epoxy. For paneling or such, construction adhesive.
aboatman is offline   Reply With Quote
Old 12-24-2017, 09:49 AM   #13
Senior Member
 
City: Albany, N.Y.
Country: US
Vessel Name: Tranquility
Vessel Model: Trojan F32
Join Date: Jan 2015
Posts: 104
To post a picture click on the ( Post Reply ) button that will bring up another screen here you should see what looks like a paper clip, click on the paper clip than (Choose file )
now you can select the picture off your computer.

You can not post pictures if you do a ( Quick Reply ) you have to click on (Post Reply)
kenk is offline   Reply With Quote
Old 12-24-2017, 09:52 AM   #14
Senior Member
 
City: Oriental
Country: USA
Vessel Name: Delphina
Vessel Model: President 43
Join Date: Aug 2014
Posts: 236
I am trying to be specific as I can .. excuse me
KEVMAR is offline   Reply With Quote
Old 12-24-2017, 09:56 AM   #15
Senior Member
 
City: Oriental
Country: USA
Vessel Name: Delphina
Vessel Model: President 43
Join Date: Aug 2014
Posts: 236
It is not structural just filling in where the rotten wet wood was removed
Attached Thumbnails
Click image for larger version

Name:	DED09213-7A01-446E-B9CD-9F9A723E6D85.jpg
Views:	63
Size:	170.3 KB
ID:	71483  
KEVMAR is offline   Reply With Quote
Old 12-24-2017, 10:55 AM   #16
Senior Member
 
City: Washington
Country: US
Join Date: Nov 2017
Posts: 467
If you're gluing wood to wood, Gorilla Glue is a very good choice. Waterproof carpenter's glue would also work.

Gorilla Glue expands as it cures so keep that in mind and clamp or screw the parts together.
aboatman is offline   Reply With Quote
Old 12-24-2017, 11:29 AM   #17
Guru
 
psneeld's Avatar
 
City: AICW
Country: USA
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 20,016
I would tend to say that repair is somewhat structural.

On my boat I used epoxy and extetior ply to fill in where rotten ply came out.

Then used liquid nails to put up tongue and groove bead board as the finished surface.

Now I am not saying liquid nails is not structural as I believe it meets some building requirements when using 2 boards together to make a span.... but would have to double check that. Either way, I would still use epoxy for glueing in the ply as the butt and scarfed joints will be stronger.
psneeld is offline   Reply With Quote
Old 12-24-2017, 11:45 AM   #18
Senior Member
 
City: Oriental
Country: USA
Vessel Name: Delphina
Vessel Model: President 43
Join Date: Aug 2014
Posts: 236
I’m gluing wood to fiberglass marine grade plywood
KEVMAR is offline   Reply With Quote
Old 12-24-2017, 12:30 PM   #19
Guru
 
DHeckrotte's Avatar
 
City: Philadelphia, PA
Country: USA
Vessel Name: Revel
Vessel Model: 1984 Fu Hwa 39
Join Date: Nov 2015
Posts: 999
Looks like the inside of the house side with the port removed. I'd expect to see polyester/'glass - wood - exterior polyester/'glass as the structure on that largish flat area. Is that what you can see the edge of in the port opening? Is that wood core rotten too? Or is the exterior of the house polyester/'glass? If you've really got an intact/not-rotten-cored-structure then what was the removed rotten wood for? Perhaps solely for affixing the interior finish surface?

My recommendations/several answers:

1, If you have exposed core around the port opening, then clean the remains of the sealants and glues from the edges of 'glass and core, scoop out any rotted core, make sure it's dry and clean, coat with neat epoxy and fill gaps with thickened epoxy.

2, If you have solid 'glass and the rotted wood was simply for providing something to affix the interior finish then any of the suggestions above for construction adhesive or epoxy should be at least as good as the original construction which was good enough until the leak caused rot. However, I would coat out the new wood with epoxy and glue it to the 'glass with thickened epoxy. I would also coat the interior surface of the finish plywood with epoxy. I soooo hate to fix things twice!

3, If you have a 'glass exterior that was intended to be stiffened by the interior rotted plywood, which you could surmise by how thoroughly it was stuck on to the 'glass with polyester, then replace it with plywood coated out with epoxy and glued on with thickened epoxy. Polyester really does not bond wood to 'glass very well.

I've done this sort of work on our sailboats.
DHeckrotte is offline   Reply With Quote
Old 12-24-2017, 12:48 PM   #20
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 5,786
+1 on the epoxy
__________________

Comodave is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 03:09 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×