Do these mount using factory attachment points or do I need to drill?

These bolt at factory rocker mounting locations — no drilling into the body required. Check your vehicle's rocker panel for existing holes before ordering hardware separately.

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

Aluminum naturally resists corrosion, but you can paint or clear-coat for a custom look if desired. If left bare, it will develop a natural patina over time. No primer or sealer is required for protection.

What hardware do I need to complete the install?

Mounting hardware is not included — you'll need fasteners rated for your vehicle's rocker panel material and thickness. Your Santa Fe's service manual lists the correct bolt size and torque spec. Local hardware or an automotive fastener supplier can provide OEM-equivalent bolts and washers.