Dash cap urethane?

I got a dash cap for my 71 duster. Very pleased with the look. And fit. I actually think I wouldn't have to glue it down almost. But I'm going to. My question is. What is the best urethane glue to use to glue it down. The front toward the windshield is my main concerned. To keep it down and not look noticeable and to not come up in the summer heat. Thanks all.