I was wondering if all the "Professionals" would mind mentioning how they use "Gorilla Glue". I have seen several mentions of use on various posts but not sure exactly how you are using it. I started building with sticks, ambroid and dope for covering. How are you using Gorilla Glue?
Gorilla glue is a foaming polyurethane adhesive. A little goes a very long way. It cures with water - sometimes moisture from the air is enough, especially in humid environments, sometimes you want to lightly damp one surface with water and apply the glue to the other surface. It will foam up and expand, so be prepared to deal with that depending on the particular joint you are gluing.
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IMHO, its the best glue for EPP. It's light weight, incredibly strong, and its slightly flexible. The new formula "clear" type sets up within 20 mins. If you trim off the expansion while its still tacky, it saves you a lot of trouble! You can also mask off areas with clear tape or fiberglass strapping tape, and the expansion will peel off easily from the tape. The foaming action is great when working with EPP, because it fills voids left when hot cutting. (Like around carbon spars) Here's an important tip that i neglected to learn before i had to toss several bottles: Clean off the applicator tip with a dry cloth, and then squeeze ALL of the air out of the bottle before capping. Otherwise, it will be one solid brick next time you try to use it.
I eat it with my corn flakes.
J/K, I use it for so much stuff that it's ridiculous.
For example, all the doorways in my house were installed with PU foam. ( the spray can )
I store it in the fridge too. Good tip CFM, you don't want any humidity to go in there...
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I had over done my melting with my soldering iron to make a tunnel under a spar so I filled her up with gorilla glue and water, taped over and left one tiny spot for it to escape - BEAUTIFUL filled hole now - shaved off excess and voila...
Good filler
KF7TRX
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I like the expanding gorilla glue for sealing/gluing carbon rods into place and then shaving off the excess. The expanding nature seals the gaps not filled by the rod/spar:
Good for anything where the gaps aren't perfect and you want extra filler. I also use this on my POD when broken as it helps secure it more keeping it sturdy after multiple crashes.
Good info and awesome pics. Thanks. Any others?
UHU POR is the best glue for foam in my opinion. You can work as you go along without having to clamp and wait for an hour.
Gorilla is too much of a pain in the ass imo, you don't know how much it's gonna foam and it's definitely not flexible unless you put too much water, in which case it's now too weak.
Neat it's like rock and can barely be sanded or cut without lots of problem.
Only time I've used it is specifically when I want the foaming properties, eg. filling spar holes. Or for example creating a nice battery/equipment bay from foam.
For example if you want to cut a battery bay out of a thinner foam wing but want to maintain some strength. Cut the hole, spray fine mist of water, very little. Now add the gorilla glue. Now get some thin film, eg kitchen film and put it into the hole and push it into the corners so it lines the bay. Now get your battery and put it into the bay. If you put enough gorilla glue it will nicely fill all of the gaps and will perfectly set your battery bay to the size of your battery. Now you can cut big hole in foam whilst maintaining the structural integrity.
I used to use Gorilla glue back in my EPS construction days, but now that I am working with EPP, I seldom use it. It simply doesn't stick to EPP very well. I used to mix it 4:1 with white glue (or wood glue) in a mixing cup and it would start foaming immediately and consistently so I'd have to use it quick. Worked great and cured in under an hour. The great part is all I'd do is squeeze the epoxy mixing cup and the remaining glue would pop out so I could reuse the cup hundreds of times.
-Alex
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Hot glue sticks very well to EPP. I tested it on two pieces, and when I tried to break them loose, the EPP itself broke but the glue joint stayed solid.Originally Posted by IBCrazy
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