Every PPF brand throws a thickness number at you — 6.5 mil, 8 mil, 10 mil — and almost none of them explain what it means, why it matters, or when it's being used to hide something. Here's the whole story in plain English, including exactly where the film we cut sits.
First: what's a "mil"?
Not a millimetre. A mil is one-thousandth of an inch — about 25 microns. So an 8 mil film is roughly 0.2 mm thick, about 200 microns. For something you can actually picture: a credit card is around 0.76 mm, so quality PPF is about a quarter the thickness of a credit card. Thin enough to disappear on the panel, thick enough to take a stone strike that would have chipped your paint.
What the market actually sells
PPF splits into three thickness tiers, and the tier usually tells you the quality tier too:
- Around 6.5 mil — the budget tier. This is where most cheap film lives, and thickness is only half the problem. Budget film at this end is commonly TPH or PVC rather than polyurethane — materials that tend to yellow in the sun, go brittle over time, and don't genuinely self-heal. Australian UV finds these films out fast.
- 8 mil — the premium standard. This is the thickness the serious brands have all settled on for daily-driven cars: XPEL Ultimate Plus is 8 mil, 3M's Scotchgard Pro Series is 8 mil, and STEK ForceShield — the film in every kit we cut — is 8 mil. That's not a coincidence. Decades of real-world use have landed here as the sweet spot: enough material to absorb highway stone strikes, still thin enough to wrap curves cleanly and vanish on the panel.
- 10 mil and up — the specialist tier. Thicker films exist for high-impact use — think off-road front ends. The trade-off is that thicker film is stiffer, harder to work around curves, and shows its edges more. For a daily driver it's more film than the job needs.
Why thickness alone can mislead you
Two films can both say "8 mil" on the box and perform nothing alike, for two reasons:
1. The material matters more than the measurement. Quality film is TPU — thermoplastic polyurethane — which stays clear, stays flexible and re-flows when warmed, which is what self-healing actually is. Budget film is often TPH or PVC dressed up with the same thickness number. A well-made 8 mil TPU film will outperform a thicker PVC film every time; the thickness figure on a cheap film is the best thing about it.
2. The stack isn't all the same stuff. A film's quoted thickness is the whole sandwich — the polyurethane core doing the protecting, plus the topcoat and adhesive. Two "8 mil" films can carry very different amounts of actual protective core. It's the sort of detail spec sheets gloss over, and one more reason the brand behind the number matters more than the number.
Where our kits sit
Every kit we cut — headlights, bonnets, door cups, all of it — comes out of the same roll: genuine STEK ForceShield, 8 mil TPU with a self-healing hydrophobic top coat and a 10-year manufacturer warranty against yellowing, cracking and delamination. It's the same thickness class as the films professional shops charge thousands to install — the difference with us is that it arrives pre-cut for your exact panel and you fit it yourself in 15–30 minutes.
We wrote more about why we settled on STEK in Not all PPF is made the same.
The short version
- 8 mil (~0.2 mm) TPU is the premium daily-driver standard across the industry.
- Cheaper films are usually thinner and made of lesser material — the two problems travel together.
- Thicker isn't automatically better: past 8 mil you're trading flexibility and invisibility for protection a daily driver rarely needs.
- STEK ForceShield — what every Get PPF kit is cut from — is 8 mil TPU with a 10-year warranty.