Yup, what Sunny said. I use WD-40 Silicone spray on a clean cloth and coat the rubber strips couple or three times a year. B-A lot of products that say they are safe for weathstrips is a petroleum product witch we all know is not good for rubber products. I use a silicone spray and wet a cloth with it and wipe down every weather stripe on the car and every car I have owned. I have a 69 Chevy Biscayne all original with soft and squeak free weather-strips.
Second this. When I first bought my Boxster Gummi-pflege was mentioned. I bought some -- at a BMW dealer parts counter -- and used it occasionally to "dress" the door, window, roof, clam shell, and trunk rubber seals.I use this stuff on all my weatherstrip seals. I apply it once a year.
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The 303 works great on the plastic splitter...mudflaps...rocker panels...etc...I used "303" protectant on my previous Challenger, and use it on my present SP.
It's safe on all black exterior trim, interior plastics, and all rubber seals.
303 has "UV" protection in their formula, and it really does keep all the above looking like new, without that greasy armorall looking shine or feel.
Two Challengers, nine years of use, and it works.
Actually I think it was you that might have mentioned this product while back as I remember it being something recommended by the BMW dealer.Second this. When I first bought my Boxster Gummi-pflege was mentioned. I bought some -- at a BMW dealer parts counter -- and used it occasionally to "dress" the door, window, roof, clam shell, and trunk rubber seals.
When I washed the car after when I was wiping the car down I made it a habit to wipe down the rubber seals with a clean damp rag to remove any dust or other stuff. Also, I kept the surfaces the rubber sealed against clean and waxed.
After 15 years all the car's weather stripping seals were just fine.
Yep, only trim that I don't use it on my '16 are the tailight surrounds, the piece between the tail lights, and the trim around the headlights.The 303 works great on the plastic splitter...mudflaps...rocker panels...etc...