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Some Cybertruck Owners Say Their Trucks Are Shedding Body Panels; One Thinks He Knows Why
(www.roadandtrack.com)
this post was submitted on 23 Feb 2025
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I don't even know the name of the adhesive they used. I do know that it was made by 3M and that it's orange.
Well, OK. So maybe that adhesive is stronger than a weld on that particular plastic. Of course, if you're talking about adhering a plastic to a metal you cannot weld it so Elmer's would be "stronger than a weld". But whatever's going on it's not adequate.
E: and actually welding plastic together typically isn't that strong, a mechanical bond can easily be stronger than melting the plastic to weld it.
Epoxy bonding on body panels is super common on many cars now. And it’s the only way to bond incompatible materials like aluminum and high strength steel.
Even steel body panels can’t be welded to high strength steel because the heat affected zone will be weakened by the weld and will crack just outside the weld.
Adhesives to create a mechanical bond, and the 3M body adhesives include glass microbeads that prevent you from squishing the joint too tightly, which makes the bind more effective.
Now using it in dirty or coated stainless steel clearly isn’t working, and the design of thin strips of shiny steel that will grow and shrink a lot, mostly in one direction on a design that was done by a 7 year old in a hurry to draw a truck is another issue.