Quote:
Originally Posted by Sam86
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 |
I was just stating the term "glue" is vague, that's all.
I understand a bit better what you're saying, just understand the resistance you're experiencing is because its rather uncommon to do it that way. Asking for validation of uncommon practices on the internet when there's well established methods will always be met with scrutiny, so no surprises there...
Ultimately if it works well then its another tool in our collective belt, but not enough existing experience to validate it outright.
My only question for that product is that its listed/marketed as a sealant, not an adhesive. Sealants can bond extremely well to substrates, but can suffer from cohesive failure (the material itself tears apart but its still bonded to each substrate) more easily than structural-rated adhesives.
Structures are loaded in tensile (pulling), Shear (sliding), and peeling (like pulling tape). Sealants don't typically have high peel strength (hell some adhesive's don't either) and that is the type of loading that a wing/lip/duckbill will see around the edges, mixed with some tensile strength as the front edge wants to be pulled up. Silkaflex 227's 'tear propogation resistance" sounds a lot like peel strength... 6N is only 1.35lbs of force, which isn't a lot, so that's my only concern. Once it's completely cured keep a close eye on the front edge and corners for any cracking/tearing. If you see nothing after months of use at highway/track speeds and hot sun heat cycling, then I'd say you're golden and just check it periodically.