Rear speaker sun rot?

I am putting some Alpine Type-R 6 1/2s in the rear deck of my car, but I hated the old way the speakers were mounted, so I made a new fiberglass mount for them. They mount to it, and then I am going to have the grill that came with them on each, but it does not cover much of the speaker. My question is will the sun quickly kill these speakers because they will be exposed all the time and the car will be parked (unfortunately) outside all day. If this is a problem, I guess I could get a different grill, but I want something that looks good still and easy to remove if necessary, hence the reason I replaced in the first place.

this probably isn't what you want to do, but get the back window tinted with UV protection   btw i installled those speakers and they rockAlpine CDA-9847---Alpine MRP-T220---Eclipse 36201---6.5" Type S Components---6.5" Type S Coaxials---2 10" Thunder6000's Isobaric

I dont think you should have a problem. The Alpine Type R speaker have rubber surrounds so they should be ok if they are in the sun most of the day.

exactly, and even paper stock crappers take several years to fall apart in the rear deck car 1 = alpine 9807, mtx 404+mtx 311d, polk speakers, kappa 10"

car 2 = pioneer 7700, kicker 400x1, kicker 60x4, 10"compvr x2, kappa speakers

Well that's what I wanted to hear.  I guess I will just put them in and see what happens.  Thanks for the help.