Will this interfere with a factory trunk seal or hatch closing?

No. The spoiler mounts to the rear deck panel and sits above the trunk line. Verify clearance to your specific hatch by test-fitting before final fastening, especially if your trunk seal has been recently replaced or reseated.

Can I install this without drilling or cutting?

Yes. It's designed to use factory mounting points on the rear panel. Inspect your vehicle's anchor holes before ordering to confirm they're present and accessible. If holes are missing or filled, you'll need to drill new ones — reference your vehicle's OEM service manual for exact hole locations.

Should I use adhesive, fasteners, or both?

Fasteners through the factory mounting points are the primary installation method. Some builders add automotive-grade adhesive under the base for extra rigidity, but it's not required if fasteners are tight. Sand the mounting surface lightly before assembly for best fitment.