Quote:
Originally Posted by wheelhaus
Some glues (commercially called adhesives) can be unbelievably strong, flexible, and incredibly resilient to temperature, chemical, and environmental conditions. They however typically require removal of the painted surface and proper prep of the surfaces as well as chemical compatibility to the substrates being bonded. They typically have tolerance enough to fill small-moderate gaps in the bond-line (space between the substrates) and when done correctly, leave no (or minimal) air entrapment. They are permanent af.
I wouldn't trust some random off the shelf "glue" to hold on a wing/lip etc., or, well, anything for that matter... It would need to be an industrial grade 2-part adhesive with properties designed for the application and just as important, the prep process to be performed to a T.
3M's acrylic-based VHB adhesive tapes (very high bond) are probably the best double sided tapes in the world, and still there's a few dozen variations depending on application. Again, surface prep is very important, but typically doesn't require any damage to the finish to do so.
A thin bead/fillet of sealant just inside the tape line, or in gaps, or just outside the tape line would be a good idea to prevent water ingress if the tape can't be applied consistently for some reason.
Source- I work with aviation and aerospace composites.
tl:dr-
For this application, I'd say just stick with high quality 3M tapes and very clean surfaces and make sure the pieces of tape are butted snugly together to keep it water tight.
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I agree with what you're saying however in my case I didn't use a random off the shelf glue (assuming you're referring to what I used) I believe it is an primarily an industrial glue, they just also supply it commercially. I researched what others used and the most common adhesive I saw others use was Sikaflex which is what I got. It states that it bonds with paint coatings and other general bodyshop materials.
It didn't state I had to do any paint removal/ sanding.
Here's a product link to the exact adhesive I used
https://industry.sika.com/en/home/au...aflex-227.html