I replaced my hoodpad more than a year ago and it looks like it's going to stay for life. 3M-#08090 is the adhesive I used; and like any contact adhesive, apply it thoroughly and evenly, then allow the glue to set-up before making contact.
I also found it necessary to wedge a few old (hockey) sticks, strategically located between the engine compartment and some pegboard scraps, to provide compression against the pad during the initial set (with the hood lowered to the intermediate position).
Barrie