Will this carbon fiber pattern fade or yellow in the sun?

The protective finish on these visors resists UV damage, but long-term outdoor exposure will eventually dull the pattern slightly. Parking in shade or using a car cover extends the finish life significantly.

Do I need to seal the edges where they meet the window trim?

The edges are factory-finished and designed to sit flush against OEM trim. If you notice gaps after installation, a clear silicone bead along the perimeter will prevent water intrusion — standard practice for any visor install.

What's the best way to clean these without damaging the pattern?

Wash with mild soap and water using a soft cloth. Avoid abrasive scrubbers or harsh chemicals that can dull the finish. Dry with a microfiber towel to prevent water spots.