Quote:
Originally Posted by wheelhaus
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.
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Thank you.
In regards to its adhesive properties, to quote what is says on the back of the tube it is "suitable for making permanent elastic seals of high adhesive strength".
Its been 10 days now, certainly not long enough to be certain but its been both hot, cold and rainy in that time. I daily drive the car, open and close the boot regularly and so far it has held up. The main test was when I had my car polished yesterday in hot weather. I didn't tell the guy my spoiler was glued on and he spent a fair bit of time and used a fair bit of force when polishing and drying it which didn't cause it to budge. (And he definitely wasn't being gentle as he broke one of my fuel cap clips from using too much force).
If I wiggle the spoiler or use a bit of force on it, it doesn't budge or feel like it's going to come off. If anything the spoiler itself feels like it would snap since it's just hollow ABS plastic