its just a cheap as chips vinyl mate. any sort will do. your just using it to create the white backing.
when you vehicle wrap and us a laminate vinyl then that is important with what you use.
i always try enforce only to use the same equivelant in laminate as the wrap. soooo.. if you use kpmf wrap, it should be kpmf clear wrap. same with avery and the like. but as far as i know they dont have same in clear, just offer a good cast clear.
you will find that by then you are almost doubling your wrap material cost.
on the other hand grafityps, grafiwrap is only about £7.40 a metre but comes with equivelant laminate. so you get both for the listed price of £7.40 which is good going as most wraps whould be laminated.
i “think” mactacs macfleet have a clear wrap but doesnt come as part of price tage. i think you will pay about £10 for both per metre. thats another very good wrap material.