What do you all use to keep the seals flexible? I hear a squeeking sound when the drivers' window goes up and think maybe I should do something about it before it tears out the seal.
Thanks
LouM...

I use a silicone spray, spray onto cloth and apply to all rubbers/seals

Aerospace 303 Protectant applied as above.

I'm given to understand that the large lower weatherstrip that naturally wears badly from car entry is NLA.... true? and if so does anyone have a driver's side available in unbroken condition?

I use the 'highly endorsed' Gummiphledge on all the rubber seals. I think I got it from AutohauzAz?

I use the 'highly endorsed' Gummiphledge on all the rubber seals. I think I got it from AutohauzAz?

...Gummipflege...

I dont think BMW makes it anymore. I treat my tube like gold. Stuff works very well. I have had the same tube for about 8 years and use it all the time. It takes very little to lube them up and it lasts for years.