Amazing goop is very toxic indeed! I'm surprised the silicone didn't work, because I think that's what the poison-frogs guy did. Though I think he stapled it on first, and then covered over the staples with silicone. Anyways, there is one version of the goop that is non-toxic once dry, (I think), and that's a marine goop. Supposed to be able to use it when building your own fishtank, so it should be safe for vivariums as well. Liquid nails is sometimes used in terrariums to attach tillandsias, and I haven't heard any reports about animal deaths due to it's use. When in doubt though, don't use it. Better safe than sorry!

You can try marine epoxy if you are worried about safety, it's supposed to not leach and water safe once cured, hence its use by aquarium hobbyists. I've no experience in this application though. Personally to deal with flies and ventilation, I just drape over the air holes with old tshirts as far as using what I have on hand :)

'Super glue' has a feature that most are not aware of, and that is it will not stick to itself. That is to say, if a film of the glue has already been set and formed a film on a surface, subsequent attemps to glue to this surface will be weak and will fail. If a joint fails on the first attemp, the surfaces should be thoroughly cleaned and all traces of the old super glue removed before trying again. Its persnicky. An acidic surface interferes with bonding strength whereas a basic surface aids setting and bond strength. When preparing the surfaces for joining, a final wipe with amonia will aid. However, the surfaces should be dry before gluing so wipe away any liquid amonia and allow drying before gluing.

I was just looking for adhesive yesterday to bond wood panels....in the house without blowing my self up having a furnace on. I'm still not sure how safe I am with what was bought, they will mention flammable, but nothing is said about not being flammable. And tech sheets are for some scientist I haven't met yet. Branding doesn't help. It just adds confusion as to what the actual adhesive is meant for. There were more types than one would want to count. Glues are as interesting as paint to me. Both can have properties for use beyond their specified application. And branded for doing so allows them to increase cost of material significantly over what they would normally be used for. I remember 20 years ago seeing a crackle finish. A recipe combination of acrylic paint and hide glue. The guy at the hardware store said he had never heard of hide glue. When found, it was a couple of dollars for a quart. Now twice that for a very small bottle. Hide glue is the centuries first glue. It is now used for fine furniture inlays, old manuscripts/books/art restoration and wood musical instruments. One has to be a skilled craftsman to use this. Although still used by many woodworkers too. Not clear if it is the same formula as once was. Just a glue history lesson... Glue for the normal user can be very confusing. And due to regulations is not what we once knew. One of the things I have found is a good contractor may use the same type for an application, but their adhesives are far superior to what we are offered. If you want the best in various construction needs, even beyond adhesives, head for the contractor's options. Thank NASA for our selections and gluing a plane's tail. A positive as they have given us hundreds of every day life products than we could list here.