I'm trying to stick a 50 x 100 mm strip of Velcro to a horizontal surface on the underside of the dashboard of my car to hold a small electrical gizmo. The surface is a hard plastic of some kind
So far I've tried the adhesive already on the Velcro Heavy Duty strip which hardly lasts any time at all - it falls off as soon as the car gets hot inside. Evo-Stik 'Serious Glue' (supposedly for plastics) doesn't do any better, nor did a generic double-sided sticky ("bonds almost anything") tape.
Obviously I need something that comes in a small tube rather than a big can since I'll only be using a very small amount. So any suggestions before I spend a small fortune trying out the various offerings at B&Q et. al...?