Re: What did you do to your WK2 today?
I would say as long as you stick to any of the leading glass/polymer chemical company offering tints these days have their dyes figured out to delay the fading.
But if you want to avoid this, just go ceramic tints. Here are the respectable polymer manufacturers that I know of from checking the tint I got:
1. Eastman Chemical Co. (of Eastman Kodak) - Huper Optik, Llumar, FormulaOne, V-Kool, Gila...
2. 3M - 3M Automotive Films
3. Saint Gobain (produces plastics for aerospace, automotive, home, etc) - Solar Gard
4. Lintec - Madico, SunGard
The important thing is that the installer is a certified dealer and has been doing tints for quite some time so that he knows how to work with the tint film he's using and can get support should there be warranty work needed.
2015 Jeep Grand Cherokee High Altitude Eco Diesel (Canada) - Valentine 1 + Blend Mount + Invisicord - Thinkware F750 front + rear Dash Cam + Cellink Battery B - Weathertec Front + 2nd Row + Cargo - Solar Gard Ultra Performance Ceramic Tint - 3M Paint Protection Film