beautybelow
Contributor
Isn't that stuff GREAT! Only comes off with a grinder. I think you're right, but I'm pretty sure most of the 3M stuff contains silicone. Much different than just silicone, though...obviously.
Well, whatever it is it's not the right adhesive for your job. I have used literally hundreds of tubes of this stuff and it, as you said, not right for this job.
I would have to look but I bet there is no silicone in it. That would be my guess anyway.