I dont use the sunroof much because of how harsh the sunlight comes in when the sliding cover isnt in place. But i still wanted to use the tilt-function. So i took some leftover window-frosting and cut to size. You can see the crappy job i did as it didnt go all the way back, lol. But it worked out really well.

This is the stuff i used that i had lying around from an unrelated project.