The best adhesive I ever found was an automotive adhesive used for interior trim components. I can be purchased at any auto parts supply store. That stuff REALLY made the grips stick. I used it on my aluminum bars and it worked really well, had to cut the grips off sometimes because they were on so tight. Basically, one slice down the grip and it would peal off. Then I used it on my new carbon fiber bars and it was way too strong of an adhesive. I had to cut the grips off, piece by piece, and was worried I would ruin the bars. It took forver to get them off. I don't use the adhesive anymore with my carbon bars But, for metal bars, it works great, just be ready to replace your grips of you need to take anything off your bars!