What is Vinyl film (PVC) and vinyl sheet?   Vinyl, otherwise known as polyvinyl chloride, or PVC, is a thermoplastic material, which means that it can be reprocessed using heat. This property affords it the capability of being manufactured in a broad range of formats. However, with respect to signs, decals and graphics, we refer to vinyl as a thin film that ranges in thickness from .003” to ¼”.