Will the carbon fiber yellow or fade over time without UV protection?

Carbon fiber is naturally resistant to UV damage, but exposure to intense sunlight can dull the finish. A clear coat UV protectant applied after installation will preserve the glossy appearance long-term and is recommended for maximum durability.

Do I need to seal the edges where the visors attach?

The mounting edges should be inspected during install. If gaps exist between the visor and the window frame, silicone sealant or edge trim can prevent water infiltration. This depends on fit tolerance and your climate.

How do these mount to the vehicle?

These are designed to work with factory mounting points on the PT Cruiser window frames. Test-fit before committing to any adhesive or fasteners—mounting method confirmation is recommended before install.