There's a lifetime warranty on Diamond Shield.
www.diamond-shield.com
1-888-806-5862
I think that only the new 'Nano fused' shield has that warranty. From their site:
""Big or Small, all Diamond Shield Nano-Fusion installations booked directly through our call center now come with a National Limited Lifetime Warranty. ""
Where any previous install is actually known to have a service life, and not under warranty-
""Regardless of the film manufacturer, the useful life of first and second generation Paint Protection Film is time limited. Older film technology offers limited life expectancy which means it is more likely to stain, yellow, or crack. The expected life can vary depending on film type, climate, and general maintenance.""
Worth calling about, but I wouldn't hope of having a no expense replacement of your film. Especially if you have not followed their recommended care:
https://www.diamond-shield.com/product-careFound a c2015 list of what Diamond Shield used to post for the care here:
https://www.coachspecialists.com/blog/rv-diamond-shield-information-tips-removal-and-replacement-costs/ (scroll to bottom)
I was unable to locate a copy of the limited warranty they do offer. Its odd they dont have a link to it on their site.