lightly peely somewhat sticky glue? - Page 1
Forum section: electronics / repair

author: coppercone2
author_rank: Super Contributor
timestamp: March 28, 2021, 08:08:21 pm
content: If you need to glue on something that you might need to get under one day, what is a good glue ? Particularly for a lens type thing, my crimp tool has a plastic graduated cover that fits over a slot that shows the crimp setting. I had to pry it off (thankfully easy) because it was filled with some kind of weird fuzz underneath!.So I am thinking what is a good glue that is slightly gummy, peelable and stable.I feel like fucking around with epoxy or super glue is a bad idea here. Electronics silicone spread with a tooth pick?

author: vjekobalas
author_rank: Regular Contributor
timestamp: January 29, 2022, 11:17:20 am
content: red silicone sealant as used in automotive industry or similar

author: jpanhalt
author_rank: Super Contributor
timestamp: January 29, 2022, 11:27:06 am
content: "Rubber cement" was an old solution, but not a very good adhesive. (e.g.,https://www.target.com/p/elmer-39-s-4oz-rubber-cement-adhesive-with-brush-applicator/-/A-17088978?ref=tgt_adv_XS000000&AFID=google_pla_df&fndsrc=tgtao&DFA=71700000012806747&CPNG=PLA_Seasonal%2BShopping_Local%7CSeasonal_Ecomm_Home&adgroup=SC_Seasonal_School/Office+Supplies&LID=700000001170770pgs&LNM=PRODUCT_GROUP&network=g&device=c&location=9015391&targetid=pla-1430701857778&ds_rl=1246978&ds_rl=1247068&gclid=EAIaIQobChMI8f6Aku3W9QIVQhB9Ch2rPQkbEAQYBSABEgLGdfD_BwE&gclsrc=aw.ds)The modern stuff used to stick credit cards to envelope inserts and similar temporary applications may be ideal. Its appearance suggests it may be a hot melt.

author: coppercone2
author_rank: Super Contributor
timestamp: January 29, 2022, 05:44:32 pm
content: lol, I think I used electronics silicone dotted on with a q-tip.. the red silicone looks to be worth investigatingrubber cement expired in the fridge for me

author: nali
author_rank: Frequent Contributor
timestamp: January 29, 2022, 06:15:17 pm
content: You could look at liquid gasket products like Loctite 518, which seem to do what you want...[Disclaimer, I've not used this actual product myself so YMMV]Quote

author: tooki
author_rank: Super Contributor
timestamp: January 29, 2022, 06:32:08 pm
content: Quote from: coppercone2 on March 28, 2021, 08:08:21 pmContact cement is the stuff most similar to the adhesive backing on self-adhesive things. It comes in many kinds. But glue is likely the wrong approach entirely.They sell double sided tapes specifically for lens (by which I assume you mean bezels/front panels, not optical lenses) attachment. Easy to find on AliExpress.I’ve used ordinary double-stick tape for this purpose before. You want the art/hobby kind that has a separate liner (not the office kind that peels off without a liner, like ordinary scotch tape), so that you stick it down with the liner still protecting the other sticky surface while you trim it down. Then you peel the liner off just before joining the objects.I’d also take a look at 3M VHB tapes. They’re “double-sided” tapes that I put in quotes because it’s not so much double-sided as it is simply a layer of adhesive with no backing tape to begin with; it’s basically either clear acrylic gel or foam adhesive with a liner so it can be unrolled and applied. It works great for semipermanent applications onto smooth surfaces, with a strong hold but clean removal. It’s available in various thicknesses, you’d probably want a thin one.Another thing, similar in concept, is the 3M “Command” adhesive strips used on self-stick hooks and whatnot. They’re quite similar to VHB, but have pull tabs: pull on the tab and the adhesive stretches and pulls away without damaging the surface. (These are what Apple now uses in their gadgets to keep the batteries from rattling around, while still making removal quick and safe, since you don’t want people digging around lipo batteries with screwdrivers or knives…)Tesa makes equivalents to all these products, and no-name manufacturers make clones of varying quality.Oh yeah: in all cases, you need to make sure the surfaces have been thoroughly cleaned before applying glue or tape: free of dust, free of oils, and free of water. (Wipe down with solvent.)

author: tooki
author_rank: Super Contributor
timestamp: January 29, 2022, 06:39:26 pm
content: Quote from: jpanhalt on January 29, 2022, 11:27:06 amRubber cement is a very mild contact cement, basically. Applied to one surface only, it’s not unlike Post-It note adhesive. Applied to both surfaces, more like a self-sealed manila envelope. In all cases, like every contact cement, it must be allowed to dry before joining.There are spray adhesives for the graphic arts called mounting spray, the repositionable one is very similar to rubber cement. The permanent kind is more like a strong contact cement.Quote from: jpanhalt on January 29, 2022, 11:27:06 amYeah, it very much looks like hot-melt, but that being an industrial hot-melt, it’s going to be exceedingly difficult to use for this application, since industrial hot melt is generally not available in consumer quantities, nor in any format usable in a consumer glue gun. Given that this stuff is very soft at room temperature, I suspect it’s shipped in chunks for feeding into a hopper. There’s no way it could be used in standard 11mm or 7mm glue stick form.

author: jpanhalt
author_rank: Super Contributor
timestamp: January 29, 2022, 06:51:50 pm
content: https://www.hotmelt.com/products/surebonder-10530-credit-card-peelable-glue?variant=39822619279550&currency=USD&utm_source=google&utm_medium=cpc&utm_campaign=shopping&gclid=EAIaIQobChMIycaXlc_X9QIVY3xvBB3awQK1EAQYAyABEgJLw_D_BwELooks to me like consumer quantities are available.Edit: Here are a couple of more links ("fugitive glue"):https://www.hotmelt.com/products/3m-scotch-weld-3798-low-temp-gummy-glue-hot-melt?variant=25974888139https://glueit.com/category/applications/printing/fugitive/

author: Cerebus
author_rank: Super Contributor
timestamp: January 29, 2022, 07:22:53 pm
content: One of the most useful things in my arsenal of "gluey things" is 3m ReMount which is just basically spray on post-it note adhesive. Great for making any temporary lightweight fixing including stencils, workholding and many others. Might be a bit lightweight for what you're doing, but worth buying a can anyway because itwillcome in useful one day.Using a latex rubber adhesive on both surfaces as a contact adhesive might be a runner - it will pull off non-porous surfaces with no damage but that also means that it won't hold much weight relative to gluing area. Like other natural rubber adhesives it tends to degrade and get gummy over time.Hot melt is always an option. You might have to preheat a metal surface to give you enough open time to use it.PVA adhesive is much more effective on non-porous surfaces than you might think. PVA is reversible, get it warm and wet and it yields enough to remove mechanically, get it warm, wet and alkaline and it breaks down and releases in quite short order. Downside is that a closed non-porous pair of surfaces is going to have a drying time running into days.Cyanoacrylate is right out, it will off-gas before it cures completely and will almost certainly cloud any transparent plastic around.You could go really old-school and use the original hot-melt, rabbit skin glue. Or rosin/colophony or friar's balsam (the original optical adhesive). Or a wax based glue like museum wax. Museum wax has the attraction, like its name suggests, that it is non-marking, very long term stable and 100% removable.

author: jpanhalt
author_rank: Super Contributor
timestamp: January 29, 2022, 07:44:08 pm
content: Quote from: Cerebus on January 29, 2022, 07:22:53 pmThere are non-fogging varieties. In fact, Eastman Kodakinventeddeveloped CA for attaching lenses in its cameras. Today, there are relatively heat stable versions, but some of the early versions depolymerized at less than 100°C. Thus, use with some objects could be made temporary.

author: coppercone2
author_rank: Super Contributor
timestamp: January 29, 2022, 08:01:46 pm
content: its like a optical lens, there is a screw with a indicator on it, the lens is transparent and has a scale on it. for 4 point crimps to control crimp depth. most of the crimp tools have a rotary knob thats graduated but this is an older one

author: Bud
author_rank: Super Contributor
timestamp: January 29, 2022, 08:13:09 pm
content: You may need to call Fraser in Thermal Cameras subforum, he should be able to give an expert advice.

author: Cerebus
author_rank: Super Contributor
timestamp: January 29, 2022, 08:29:09 pm
content: Cyanoacrylates were originally developed by Harry Coover and others while working at B.F.Goodrich which patented (US2467927A) but didn't exploit them (they were looking for a glue for PMMA aircraft canopies and the methyl cyanoacrylate they developed wasn't suitable for this, preciselybecauseit fogged PMMA). Coover then later went to work for Eastman Kodak whodidcommercially exploit methyl cyanoacrylate (presumably under license from B.F.Goodrich). The original cyanoacrylate that Eastman sold was Eastman 910, which was methyl cyanoacrylate which is not one of the later non-fogging cyanoacrylates things, so no, Eastman didn't invent cyanoacrylate for attaching lenses to cameras.My experience with "non-fogging" cyanoacrylates suggests that they would be better described as "less-fogging". Although something like alkoxyethyl cyanoacrylate won't immediately wreck a sheet of PMMA in the way that methyl CA will, but it will still produce fogging in confined spaces where the vapour isn't adequately vented. They advertise these things as low-odour or low-volatility but they still produce vapour, just not as much of it. That vapour will still attach just as enthusiastically as the vapour from higher volatility cyanoacrylates will to every surface that will accept it.

author: jpanhalt
author_rank: Super Contributor
timestamp: January 29, 2022, 08:57:17 pm
content: Edited my comment.

author: tooki
author_rank: Super Contributor
timestamp: January 29, 2022, 09:42:01 pm
content: Quote from: jpanhalt on January 29, 2022, 06:51:50 pmLiterally proves my point: all of that except one requires specialty applicators, even if you can get it in consumer quantities, only some of which was.The one in the video is the exception, but it looks to me like it’s probably a low-tack/high-wax version of ordinary hot melt glue, since in the video it is shown pulling off as a solid piece. It’s not the tacky, gummy stuff I assumed you were talking about.Regardless, I don’t think anything along these lines is appropriate for what the OP is looking to do.

author: tooki
author_rank: Super Contributor
timestamp: January 29, 2022, 09:47:30 pm
content: Quote from: coppercone2 on January 29, 2022, 08:01:46 pmBy “optical” lenses, we mean things like lenses in eyeglasses, microscopes, cameras, etc. Not a “transparent thing” lens like the “lenses” that simply cover an indicator.So… any thoughts on the many, many thoughtful suggestions lots of us made?

author: jpanhalt
author_rank: Super Contributor
timestamp: January 29, 2022, 09:49:04 pm
content: Well, I guess $17.00 in your mind is a commercial quantity. Not for me. BTW, I gave additional links for consumer quantities in my earlier post.

author: tooki
author_rank: Super Contributor
timestamp: January 29, 2022, 09:58:27 pm
content: Quote from: jpanhalt on January 29, 2022, 09:49:04 pmI saw all of the links including the edit.I stated two criteria:1. Available in consumer quantities2. Dispenses in a normal consumer hot glue gunNone of the products you linked appears to meetbothof those criteria.

author: coppercone2
author_rank: Super Contributor
timestamp: January 29, 2022, 10:41:08 pm
content: Quote from: tooki on January 29, 2022, 09:47:30 pmwell I am not gonna evaluate any of this stuff because the thread is almost year old zombie thread and I said I fixed it with silicone electronics sealant on a gamble and it seems to be holding up OK. I can't really say anything until I decide to buy something...

author: jpanhalt
author_rank: Super Contributor
timestamp: January 30, 2022, 12:20:18 am
content: Quote from: tooki on January 29, 2022, 09:58:27 pmYes, sir. Who appointed you ?

author: tooki
author_rank: Super Contributor
timestamp: January 30, 2022, 03:12:01 pm
content: Quote from: jpanhalt on January 30, 2022, 12:20:18 amUmmm... your list was a direct response to the following comment of mine:Quote from: tooki on January 29, 2022, 06:39:26 pm