What is the correct way to put a sun shade on a car?

To install a car sun visor correctly, follow these steps: First, ensure the vehicle is turned off and the parking brake is fully engaged. Prepare tools such as a screwdriver and verify that all sun visor components are present. Align the base's hook with the roof mounting point above the windshield, gently push it into position, and then tighten the screws moderately-avoid over-tightening or leaving them too loose. During installation, ensure proper orientation and allow space for thermal expansion. It is best to use neutral silicone sealant and waterproof tape for sealing. Sun visors are typically made of aluminum film or PVC; the former provides excellent sunlight reflection, while the latter offers thermal insulation through its bubble layer. Be careful not to obstruct the driver's line of sight. Installation details may vary slightly by vehicle model: SUVs may require angle adjustment for stability, while luxury cars should follow the manufacturer's instructions. Sun visors not only reduce glare from bright light but also filter reflected light, minimize high-beam interference at night, and improve visibility in foggy conditions-making them a practical feature that enhances both driving safety and comfort.