Do I need any additional hardware to install these?

These use your factory tailgate mounting holes, so you're using existing hardware. Grab a socket wrench and you're set—no extra fasteners needed.

Can I paint these, or do they come primed?

They ship in textured black finish. If you want a different color, light sanding and a quality automotive paint will bond cleanly—just avoid glossy primers that can cause peeling.

Will these covers seal water out from under the tailgate?

These are cosmetic caps that sit on top of your gate. They don't alter the original weathersealing—water management stays the same as stock.