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21.5" iMac screen clamps?

Hello everybody. I recently opened up my 2019 21.5” iMac and put a SSD in it using the iFixit replacement adhesive kit. All went well, but today, about a week after the work, I was at my desk and the screen separated from the adhesive. It fell a couple of inches, but everything looks to have survived. Currently it’s reassembled and laying flat to let the adhesive reengage.

I’m ordering a second kit to replace it with fresh adhesive strips, but I’m concerned now about longevity and the future. I was wondering if anyone had come across any sort of small, discrete looking screen clamps for iMacs. Just something to act as a safety measure in case the adhesive fails. I’ve seen people using scotch tape, but I’d be concerned that a few strips wouldn’t support the full weight of the screen if it were to separate again. Any help is greatly appreciated. Thank you.

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Sounds like you hadn’t fully cleaned the surfaces of the old tape or the solvent you used left a film which interfered with the adhesion of the tapes adhesive. I’ve seen that on a few systems I had come in from folks who tried to add/replace a drive.

You really need reagent quality solvent like 90% isopropyl alcohol or toluene. And make sure the cloth or paper wipe is also clean.

Temp and pressure also plays a roll here! I use a het gun to warm the case edge before applying the tapes and after setting the panel on I heat it a bit (not too much!) so the adhesive sticks more effectively to the glass and lastly I use rubber roller (J-Roller) to help press the glass down.

I would try again following this outline, and make sure the tapes are fresh and still in a sealed bag as old stock could be dried out. Make sure you are buying from a good source like iFixit!

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Thank you for this info. I did use iFixit replacement adhesives when I initially did it and did do all those cleaning steps, but I'll be doing them again to make sure a good bond can be achieved. For peace of mind though, I'm just hoping to find something else to use on top of that so I know it won't ever be an issue.

A fabric tape over the top edge is about all there is, if you don't trust the tapes.

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Use silicone glue on the corners from any hardware store. Its a youtube pro tip, it adds a bit of extra oomph so it doesn't just fall outfrom various qualities of adhesive strips. You can also use regular clamps with rubber jaws typically found in woodshops. We usually use the plastic cheap kind and they work. Most likely you will need the larger variety of clamps, however you could just put like paper towels inbetween the clamps and screen as a protector from scratching/damaging the screen as well.

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