My son's 89 Camaro had some cracks in the dash, which is no longer made. What they do make for it is a dash cover, that looks exactly like the dash top. It glues on, and the glue that came with it was: 3M Super Weatherstrip Adhesive (part# 051135 - 08008). We installed it last summer and it has held very well. We used masking tape to hold it down tightly until it cured overnight. I would recommend using this, if the other glue you are using isn't holding up.
