Question for those more experienced with Weldwood contact adhesive.I'm in the process of redoing the interior of the one piece fiberglass shell that makes up the snap-n-nap on my amerigo tc-11 and need to install some wood to the interior edges so that I can anchor the RV wall board over the new insulation. Normally I would just apply 3m 5200 and screw it in place, but because there's no frame, and the angle at which its going in, this isn't practical.My thoughts instead were to apply weldwood contact adhesive to the fiberglass and wood so I can just press the piece in place, but I am wondering if this will be strong enough or will it lose the battle with gravity after awhile?

Weldwood is pretty good stuff but I would be hesitant to use it in the vertical were it could be exposed to big temperature change and heat from the sun . How about fiber glassing the filler boards to the shell . That's what they do on boats and truck caps for stiffeners , and they won't rot .

Weldwood is pretty good stuff and, from experience, I would say you have a 50/50 chance of success in using it. I built a Florida room for a friend who lives full time in Florida and had the same problem. I used Weldwood in putting up some of the moldings and, 10 years later, most of them stayed in place. I believe the ones that needed to be re-done were due to applicator error.

Changes in formulation may have occurred over time.Former high VOC materials have been modified to water based products, which often are not as good.Materials used ten years ago may not be the same materials available to you now.

ticki2 wrote:Weldwood is pretty good stuff but I would be hesitant to use it in the vertical were it could be exposed to big temperature change and heat from the sun . How about fiber glassing the filler boards to the shell . That's what they do on boats and truck caps for stiffeners , and they won't rot .Fiberglass cloth and resin is what I would use as well.

wapiticountry wrote:ticki2 wrote:Weldwood is pretty good stuff but I would be hesitant to use it in the vertical were it could be exposed to big temperature change and heat from the sun . How about fiber glassing the filler boards to the shell . That's what they do on boats and truck caps for stiffeners , and they won't rot .Fiberglass cloth and resin is what I would use as well.I was thinking this too. Setup a support brace to hold the work in place.

is weldwood contact adhesive strong enough? | Good Sam Community

Bert_the_Welder
Explorer II
Jul 09, 2020
I should also mention G-Flex 2 part epoxy aswell, in case you can't get PL Premium where you are.
It's a 1:1 to easy mixing and has good flexibility. Been using it for years. Was the only epoxy I found that worked for gluing steel pins in beach stone. I use them as the bases for my kelp sculptures. And thos are just little 3/16 holes and pins so I imagine if you've got a good size flat surface to surface, the bond would be pretty close to enough to hang ur TC from...... :D :B
JoeChiOhki
Explorer II
Jul 07, 2020
ticki2 wrote:
Matt a picture of exactly where you want the wood would be helpful . I thought I understood but now have doubts .

I should be able to get photos of this posted tonight if my back holds out. I have a short backlog of project update stuff to get posted.
ticki2
Explorer
Jul 06, 2020
Matt a picture of exactly where you want the wood would be helpful . I thought I understood but now have doubts .
JoeChiOhki
Explorer II
Jul 06, 2020
ticki2 wrote:
Being on an Island you must have some decent size boat shops . Talk to their glass man , there are a lot of tricks to the trade .

Not a one. We live where the last one was back in the 70s. Most of the marine and boating companies are currently corona shuttered or have gone out of business and most of all of those dealt solely in sales and accessories, and basic motor service, no fiberglass work.
Bert_the_Welder
Explorer II
Jul 06, 2020
PL Premium construction adhesive maybe?
covered_wagon
Explorer
Jul 05, 2020
Hi Joe,

Titebond Construction adhesive is really good stuff. Sold at Parr lumber, I know. HD does not have this good of adhesive. I reinforced my sagging cabover using the Titebond product. Has held on rough roads for two years now.

7 years after glueing 2x4's to concrete a basement wall, you couldn't get them loose as they were splitting apart to get them off. It good stuff, but you need to place the pieces together right away and apply pressure. The stuff really works.
Grit_dog
Navigator
Jul 05, 2020
Why not test a couple different adhesives?
Contact cement, construction adhesive, epoxies, gorilla glue.
If you can clamp it, gorilla glue may win.
ticki2
Explorer
Jul 05, 2020
Being on an Island you must have some decent size boat shops . Talk to their glass man , there are a lot of tricks to the trade .
JoeChiOhki
Explorer II
Jul 04, 2020
wapiticountry wrote:
ticki2 wrote:
Weldwood is pretty good stuff but I would be hesitant to use it in the vertical were it could be exposed to big temperature change and heat from the sun . How about fiber glassing the filler boards to the shell . That's what they do on boats and truck caps for stiffeners , and they won't rot .
Fiberglass cloth and resin is what I would use as well.

Yeah, this was my concern, glassing them into place isn't really doable due to it being an overhead job, as gravity tends to cause it to run off, so we'll likely need to brace them in with 5200.
Camper_Jeff___K
Nomad III
Jul 04, 2020
wapiticountry wrote:
ticki2 wrote:
Weldwood is pretty good stuff but I would be hesitant to use it in the vertical were it could be exposed to big temperature change and heat from the sun . How about fiber glassing the filler boards to the shell . That's what they do on boats and truck caps for stiffeners , and they won't rot .
Fiberglass cloth and resin is what I would use as well.

I was thinking this too. Setup a support brace to hold the work in place.

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is weldwood contact adhesive strong enough?

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