3M Super-Strength Molding Tape, 1/2 in x 15 ft, High Strength Double-Sided Adhesive, Permanently Attaches Side Moldings, Trim and Emblems to Interior and Exterior of Vehicles (03614)

Used this to attach a small spoiler to the trunk lid of my Honda. I found it sticks very well but I would recommend a couple of procedures as prep for best results. I lightly sanded the contact area of the spoiler to make the surface a little more “grippy” I then used an alcohol wipe on both surfaces making sure both areas are clean. After applying the tape to the inside of the spoiler and peeling off the orange top plastic I used a hair dryer to heat the tape for better adhesion. But be careful,heating the tape makes it pretty gooey and less forgiving if you need to keep lifting and repositioning what you’re mounting. [...]