Does this require any adhesive or fasteners to install?

The mounting method isn't specified in the product data. Test-fit the cover before committing to any adhesive or fasteners—your dash may have clips or tabs that secure it without additional hardware.

Does the black finish need to be painted or sealed before installation?

The cover ships ready to install. If you want additional protection from UV or scratches, light polishing or clear coat can be applied, but it's not required for basic use.

Will this fit if my dashboard is cracked or warped?

A warped or heavily cracked dash may prevent the cover from sitting flush. If your dash surface is significantly damaged, it should be assessed before ordering to ensure a proper fit.