Ultraviolet light breaks down paint, plastics, rubber, and fabrics over time. Cars parked outside in sunny climates show it first: chalky paint on the roof and bonnet, a dashboard that splits, and yellowed headlight lenses.
Shade and a little routine care slow it down dramatically.
What the sun does
- ▸Oxidises paint, leaving it dull or chalky, especially on reds
- ▸Breaks down clear coat until it peels
- ▸Dries out and cracks dashboard plastics and leather seats
- ▸Hazes polycarbonate headlight lenses, reducing light output
- ▸Perishes rubber seals and wiper blades
Protect the paint
Wash the car regularly — dust and bird droppings bake on in the heat and damage paint. Apply a wax or paint sealant every few months; it adds a sacrificial layer that takes the UV instead of the clear coat. Ceramic coatings last longer but cost more.
Protect the interior
A reflective windscreen shade makes a large difference to cabin temperature and protects the dashboard. Use a UV-protectant product on plastics and condition leather seats. Tinted windows, where legal, reduce heat and fading.
Restore cloudy headlights
Headlight restoration kits sand off the oxidised outer layer and add a new UV coating. The improvement is often dramatic and makes night driving safer. Without the coating, the haze returns quickly.
Park smart
A garage, carport, or shaded spot is the best protection. If you must park outside long-term, a breathable car cover helps — but a dirty or flapping cover can scratch paint, so fit it to a clean car.
CAUTION: This is general automotive information, not professional mechanical advice. Always follow your vehicle manufacturer’s specifications and service schedule, and have brakes, steering, tyres, and other safety-critical systems inspected by a qualified mechanic.