3M 8591 Paint Protection Film
8591 film is a thicker polyurethane film that provides superior protection compare to other thinner films, such as ScotchGard, VentureShield, and DYNOshield. However, it does not have a topcoat and therefore is not resistant to stains or scratches and is not suitable where you need to have a good-looking surface.
The following is information from 3M's website and they identify it as a 14mil (0.35mm) thick film.
- Nearly invisible protection against scratches, part wear and corrosion
- 0.3mm (12 mil/thousandths of an inch) polyurethane film base resists chipping, scratching, staining, and yellowing
- 0.05mm (2 mil/thousandths of an inch) pressure-sensitive adhesive makes for fast, efficient application without curing
- No clear coat – ideal for protecting non-visible surfaces
3M™ Paint Protection Film 8591 is a transparent adhesive film for protecting automotive surfaces from scratches, corrosion, abrasion and wear. It features a 0.3mm (12 mil) die-cuttable polyurethane base, tested for resistance to weathering, stains, shrinkage and elongation. A 0.05mm (2 mil) acrylic pressure-sensitive adhesive delivers excellent peel adhesion. This linered film has no clearcoat, ideal for protecting non-visible areas.