Whenever you are placing any signage outdoors where it is going to be subject to environmental conditions (i.e. humidity, UV rays, etc.) we always recommend using liquid lamination (specifically, our Glamour II Veneer Aqueous coating). Also, sheet lamination is always another option. Collectively, some form of protective lamination should always be used for any long term outdoor signage.
Without any lamination, although these products are semi-archival you would only expect to use them for short-term purposes. The exact time will depend on the environmental factors of your specific climate. But no significant deterioration/fading of color should occur within a 3-6 month period. Both Adhesive Vinyl and Vitality Banner are highly water resistant and weather resistant (Vitality Banner especially) and are without any doubt amongst the top of their class and will therefore perform equally if not better than any other competitive products in the marketplace.
