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  I think I have a foam idea...

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Author Topic:   I think I have a foam idea...
OutrageMan posted 03-16-2002 06:09 PM ET (US)   Profile for OutrageMan   Send Email to OutrageMan  
I have been spending this weekend making an outdoor bench out of cyprus. What does this have to do with this site you may ask? Well, it is the glue I am using.

Because this bench is for outdoor use, regular Titebond won't work, so I decided to give Gorilla Glue a shot. For those not familiar with this stuff, it is a polyurethane glue that cures in the presence of moisture. Simply spred the glue on one surface, and wet the other, and whammo, you have a waterproof glue joint.

The interesting thing about this glue, however, is that during the curing process, it foams and expands 3-4 times (making glue line clean up a chore). That hardened foam has a very similar appearance to the core foam in a Whaler.

My thought here is that if you have a small void to repair, and you can't find the 2 part stuff, that a glue of this type might just do the trick. I would think that all you would have to do is put a small ammount of water in the void, and fill the rest of theis area with the glue, and stand back. In about 3 hours you should have a nice foam patch that you can then trim back and suitably cover.

Just a weekend brainstorm during a woodworking break.


Clark Roberts posted 03-16-2002 06:16 PM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Brian, great info! Where do you get the stuff and who makes it? Thanks... Clark.. Spruce Creek Navy
JohnNorthEast posted 03-16-2002 08:16 PM ET (US)     Profile for JohnNorthEast  Send Email to JohnNorthEast     
Interesting idea for small foam repair:it is waterproof. I found the internet site. Perhaps I can attach some to the foam I removed from my whaler and see how it adjusts.

OutrageMan posted 03-16-2002 08:32 PM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
You can get it from the Tools and Hardware section of or any woodworking store. Home Depot probably carries it also.


grandmufti posted 03-16-2002 09:26 PM ET (US)     Profile for grandmufti  Send Email to grandmufti     
I have also used this glue to lock in screws that would vibrate loose in my boat.As it expands it fills the microscopic void around the screw.It works great.
Gep posted 03-16-2002 09:44 PM ET (US)     Profile for Gep  Send Email to Gep     
I used this glue in my restoration of my 13', and I never thought of using it like that. I think it would work really slick.
Cpt Quint posted 03-18-2002 04:14 PM ET (US)     Profile for Cpt Quint  Send Email to Cpt Quint     
i wonder if it will work to relaminate the floor. 2 points/ will it react adversly to the foam by heating up or otherwise and will it stick to 2 non wood surfaces? i have some 2 ft sections that need to pumped with some west sytems but that stuff heats up something terrible undere the floor line and im sure it is melting foam if not reacting to it?
Chesapeake posted 03-18-2002 09:22 PM ET (US)     Profile for Chesapeake  Send Email to Chesapeake     
It is great stuff, especially for the right purpose. Gorilla is what I used when rebuilding the Nauset console. Note: It dries brown and eaks out of the glue joint and dries to a tan plastic foam. It trims off decent and sands decent, but tends to leave a stain.

If you get it on your skin, it will leave a brown stain for a few days.

Tom W Clark posted 03-18-2002 09:39 PM ET (US)     Profile for Tom W Clark  Send Email to Tom W Clark     
Gorilla Glue is a brand of polyurethane glue, probably the most popular. There are other brands as well such as ProBond made by our old friends, Elmer's Products, Inc. It is good stuff. Very tenacious and works on a huge variety of surfaces.

Polyurethane glue like Gorilla Glue is available at any hardware store or lumber yard. It is not inexpensive. My ProBond cost $10 for a little 8 oz bottle.

At Brian's suggestion I will try a little experiment with this glue on ol' CSW and we'll see how it does.

I think that if there is a large void to be filled (and you don't want to proceed with the repair according to Whaler's official instructions), then you would be better off just buying a can of expanding polyurethane foam. There are lots of different types of expanding foams out there with different properties. But the ones I have used in my trade are quite strong and tenacious. Do not buy the latex variety!

There will be no compatibility problem with Whaler foam and Gorilla Glue nor will there be a problem with Whaler foam and a can of expanding polyurethane foam. They are all polyurethane.

Cpt Quint, do not worry about melting. Neither polyurethane not epoxy will melt your foam.

Cpt Quint posted 03-19-2002 10:34 AM ET (US)     Profile for Cpt Quint  Send Email to Cpt Quint     
Thanks for this info, I wonder if west's slower hardners will have a better effect than the rapid cure time or 205. The floor relamination process i have done before and the bottom line is you want a permanent bond one that you do get from 2 part epoxies like west system.
JohnNorthEast posted 03-19-2002 09:28 PM ET (US)     Profile for JohnNorthEast  Send Email to JohnNorthEast     

I wrote to Gorilla directly here is my question and the response I just received

"Can Gorrilla glue be used to replace a small amount of foam on the inside of a boat hull? I wonder if this will holdup to water over time? Also, can it attach to fiberglass or gelcoat? " Thanks John

Yes to all three questions. Just read the directions and follow them closely. Good luck on your project. "

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