I have been a GM owner of one model or another for decades. I always wonder why GM and probably other manufacturers as well use a rubber window trim that always rubs off black on whatever kind of towel or rag you wash the windows with. Is there a product on the market that will seal these parts and prevent the black from coming off? I'll never buy anything but GM, but this really puzzles me.


2011 Crystal Red Tintcoat 2LT, Chrome Mirrors and Handles, sunroof, Black Leather. I Love It!

 

Not sure if it will stop all black from coming off but I always keep it treated/protected. I used to use what ever I was using on my tires at the time, a few drops on a rag and wipe down the rubber moldings and wipe it dry. (keeping it off the paint and the glass) A product made for black trim would work too, I think "Back to Black" is a brand name... (maybe???)

These days, now that I am using a black detail spray on my black car I've been using that all around. Works great on the running board trim/ front bumper insert/ and my GM mud flaps too.

The idea is to keep the rubber from drying out which is what causes the rub off.....

 

I don't have that problem... IDK ??

 

Thanks graybeard, I'll give the tire shine treatment a careful try. It makes sense it should help.

 

I have had to armor-all (or whatever you like) my trim on every GM I have owned since my first one, a 1969 Buick Skylark. Seems like if the rubber starts to decompose from not being treated you get black smear.

 

I use Nanowax on everything. Paint, rubber, plastic, glass.

 

Mother's Back-to-Black works great on the rubber moldings.

Later
Allex

 

Maybe its the rubber batches, or the climate, but just out of curiosity I took a clean white rag to the rubber moldings on mine....nothing came off on it...IDK either sleeper.

 

To be honest I have never had an issue with any GM rubber strips. I use no treatments and or coatings and mine look like new.

Nothing on my towels.

Note I always keep the car clean and inside other than when at work. Often I think a lot of what some people get off the strips is just worked in grime. Rubber can retain dirt and grime. Often things put on will attract that much more black dirt to the rubber.

I use Meguires on my tires and my rags are just black from the dirt. It shines a tire but also attracts dirt.

 

That's why when I used the tire stuff on the rubber trim I wiped it dry so as to not attract dirt, but it does treat the rubber and keep it from drying out.