You should contact your local 3M company and inquire about UV film. While the films have a finite life span, it's not very expensive to replace every five years. However, if security is also a concern you should contact Bob Ducibella at voice line 203-393-0430. He has done some research into UV protective films that are also very useful in preventing glass breakage. If you decide to go the 3M route E-mail me at [log in to unmask] and I can go through my catalog to find a rep. for your area. Gary Acord [log in to unmask]