3M VHB Tape 5952, 2 in width x 5 yd length (1 Roll)

Used this alongside adhesion promotors. My spoiler is NOT going anywhere!!

This tape is amazing!! Used it to put on new truck bed rails, and the adhesion is awesome.

I have used this product for years and once it is use to tack something in place, do not expect it to come loose. It is not easy to remove once affixed. Depending on what surface you put it on you could do serious damage trying to remove it. It is consider a permanent solution.

Outside of industrial uses, this double sided tape is the best you can get for anything reasonable. By reasonable I don't mean holding up a poster on your wall, this is overkill for that, I mean putting a poster in an expensive, heavy frame, and then putting on your wall. You could probably get away with mounting a shelf to the wall with this stuff, then set your poster in frame on top of that shelf. It just works... So long as you let it set/cure for a little bit. I find that when mounting something heavy I need to hold it in place for a few minutes to let the adhesive do its work, otherwise it will probably fall off. That's probably a good quality because it allows you some time to reposition things if they aren't quite right the first time.

Strong