Dash pad repair - thoughts

Hi All.
I have a dash pad from a Dart that has one tiny little crack up in the corner by the windshield post that I like to seal up so it doesn’t get any worse.Any thoughts on what I could use ? it’s literally 1/4 of a inch long . I know they’re kind of notorious for cracking there So I know other people for sure have dealt with this. It’s out of the car so get into it is not an issue