Baton Rouge Southern 3.0 - a Design discussion

[Steveruger45]

I used this and would use it again.
https://www.homedepot.com/p/Liquid-Nails-Interior-Projects-10-oz-Tan-Latex-Construction-Adhesive-LN-704/100659439

[C855B]

Does Guerilla Glue actually ever successfully bond two surfaces ?

Never has in my experience... YMMV.

Uh... never a problem here with wood-, plastic- or foam-to-wood. I have weight-bearing projects built 10 years ago that are rock-solid. But it tends to require ample curing time; you do have to wait about a day before "testing" the joint. Follow the instructions, however - glue on one side and lightly dampen the other side with water. Water activates the urethane polymer.

Where I found Gorilla Glue inadequate is anything-to-metal.

[LKOrailroad]

I have used PL300 with good success. Somewhat slow to cure but results in a good bond.



Used it extensively for re-purposing scrap odds-n-ends into more useful larger pieces.

[C855B]

I have used PL300 with good success. Somewhat slow to cure but results in a good bond.

Thanks. Good idea. Gorilla cures too solid to use that way. I'll pick up a tube next time I'm out violating the stay-at-home orders.   

[Philip H]

Well as it turns out the construction helpers 11th birthday was yesterday and she wanted lasagna. We were short ricotta and cottage cheese for the recipe so I broke isolation and dashed to Walmart. Two tubes of Project Cement found there way into the bag with the cheese. So we will resume work tomorrow after they finish quarantine out in the garage.

[Philip H]

Glue applied and new distributed clamping method:

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[wazzou]

I’ve never even heard of salt for a pool.
Is that to help buoyancy?

[Jbub]

I’ve never even heard of salt for a pool.
Is that to help buoyancy?

Salt water is more dense therefore increasing the buoyancy of objects in it.

[Philip H]

I’ve never even heard of salt for a pool.
Is that to help buoyancy?

Its a salt water chlorination system.  They are pretty common down here - less harsh chemicals and the pool lasts longer, as do the parts.

https://www.riverpoolsandspas.com/blog/saltwater-pools

[LKOrailroad]

Curious... being an easily marked rectangle and the foam relatively thin, why did you not just use screws?

[Philip H]

Curious... being an easily marked rectangle and the foam relatively thin, why did you not just use screws?

Even with the most careful driving you aren’t going to seat the screw perfectly, it’s gonna compress some foam and then you have holes to fill. I’ve seen plenty of glued foam decks so that’s where I went. Plus how often do you get to use full bags of salt to hold something down while it dries?

[freedj]

I realize it's a bit late, but glidden gripper primer works great as an adhesive for ridgid foam:

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I used glidden gripper in a non railroad related foam glueing task and it worked great!

[C855B]

I realize it's a bit late, but glidden gripper primer works great as an adhesive for ridgid foam: ...

I have extensive experience with Gripper, and found it to have trouble with large laminations like Philip is doing. Small joins where the air can begin the catalyzation process are OK, and it works great there, but applied too thick and/or too far away from edges, it will remain liquid, as if it was still in the can. Foam-to-wood with Gripper is probably not too bad since air will penetrate the wood and the wood will also absorb the paint, but large foam-to-foam laminations simply won't cure. I had to rip-up about 10' of scenery base and track sub-foundation after discovering Gripper wasn't drying in the middle, even after a week. It was a mess. Still use it for "shell style" scenery forms, however.

That's why I mentioned Gorilla Glue (above) for this kind of work, the curing process starts with exposure to water and to a lesser extent, humidity in the air.

Liquid Nails Project was a good choice in Philip's case. It has good initial grab so everything isn't sliding around as you clamp or weight your work. I built an HVAC duct system out of XPS foam using Project as the adhesive. I didn't like the working consistency that much for edge-to-edge joins, but it's holding up just fine after six years.

[Philip H]

As they say - up an at ‘em:



Now to get @AlkemScaleModels trackplan translated onto the foam.

[Frank Amato]

Yes!  Another shelf switching layout!  Nice progress so far.

  Frank