Why is the car roof leaking?

[Tom]

The following are the reasons for roof leakage: 1. Sunroof leakage: There are generally two situations for sunroof leakage. One is that small sand particles or dust in the sunroof drainage channel cause blockage; the other is that the sunroof sealing strip has shifted and been "lifted." If the sunroof sealing strip of the car has shifted and been "lifted," it indicates that the friction between the sealing strip and the roof is too great. 2. Failure of the car's waterproof sealant leading to leakage: Leakage usually occurs at the switches of doors and the luggage compartment. The main cause of this situation is mostly due to the waterproof strip, that is, the poor condition, aging, or breakage of the rubber waterproof strip, allowing rainwater to seep in from there.