GLASS .... I dropped one of the factory ones when I installed the exterior rear view mirrors with approach lights

Edit: Added picture, broken in upper right corner of drivers mirror. These are available if anyone needs them. Passenger mirror removed at less than 100 miles ( like that matters )

 

Is it difficult to remove the mirror?

 

Thinking of applying rain-x on side windows and mirrors, couldn't figure out if side mirrors are made of glass or plastic. Rain-x is safe for glass only.
If anyone is using it on newer models or can confirm the mirrors are made of glass it would be great.

FYI: in case you need to treat anything else

I have used this:

on many different vehicles for almost 30 years. Was introduced to it back in 1996 as a great plastic windshield cleaner/protectant for my motorcycles. Ever since then, have used it on boats, cars, everything. You can obviously purchase it at any Honda dealer's parts desk. There are now a few similar products out there as well, mainly 'geared' towards the biker community, but it can be used on anything. It is great on the interior plastics like the clear dash panel or our huge infotainment screens. Plastic headlamps and taillamps too!!
It's like a Pledge...but for cars

EDIT: here is a pic of the 'newer' looking can:

and the biker community version (same stuff, different can):

 

Did the side front windows and mirrors. No side effects for the mirrors.
Drove it light drizzle - droplets from side windows blown away at ~30 mph, mirrors couldn't see any difference.

 

HOW TO is in the attached instructions