Black streaks from weather stripping on white cars
 

Hello!
So im sure like me, many of you who owned a white car have noticed the black streaks that run down from rubber seals around the body of the car after its raining or after you wash your car. Its been bugging me for a while and i came across people that say applying a silicone based rubber sealer will stop this from happening. Im wondering if anyone has tried this and if it works. Any product recommendations would be appreciated as well

Thanks!