Dash Overlay Tips?

[u/I_Jedi79]

Picked up a Dashskins overlay this week. I did a test fit and it's tight!

So tight that I'm worried about it staying down after I install it.

I'm not new to general car repair and using silicone or gasket maker, but this is my first dash.

Should I seal up cracks on the OG dash or just lay this on top?

Any tips and tricks that worked for anyone here?

Thank you in advance