Recently, I read where an individual used Opti-Seal on his weather stripping and felt it was doing a great job keeping it looking new.
It didn't sound like anything I would have tried, but.....
A couple of years ago I wasn't using rinseless washes and WOWA sealant so what do I know?
Any of the Opti-Seal experts have some opinions?

I wouldn't think it would lube and soften like they need. It may add looks, but could be detrimental over time. I would use OPP or OptiBond instead.