The paint protection film is mainly composed of the uppermost layer of coating, the middle layer of TPU substrate, and the bottom layer of glue, of which TPU substrate accounts for 70%, so the thickness of the car coating film is mainly determined by the TPU substrate. At present, the thickness of the common invisible car cover on the market is roughly divided into the following specifications, 6.5ML, 7.0MIL, 7.5MIL, 8.0ML, 8.5MIL, 9.5MIL, some brand models and 10.0ML models.
Popular science knowledge: The MIL here is a unit of length, representing one-thousandth of an inch, 1mi = 0.0254mm, and 2m is equivalent to the thickness of an A4, so it is difficult for the naked eye to distinguish different thicknesses of car coverings. Professionals should be used when measuring thickness gauge.

Protecting your vehicle’s paintwork from daily wear and tear is essential for maintaining its appearance and value. Paint protection film (PPF) is a popular solution that creates a barrier against stone chips, scratches, and other damage.If the invisible car cover is too thin, the protective performance will be reduced, and if it is too thick, it will increase the difficulty of construction and the risk of edge warping and degumming. What thickness is the most suitable?
Here’s a breakdown of common PPF thickness measurements and their characteristics:
6 mils: It’s designed to provide enhanced defense against stone chips, scratches, and other road debris. This thickness is a popular choice for daily drivers and performance vehicles, as it offers a good balance between protection and visual appeal.
8 mils: With a thickness of 8 mils, this PPF is ideal for car owners who want even greater protection for their vehicle’s paintwork. The increased thickness provides a higher level of impact resistance, which can be especially beneficial for vehicles that encounter gravel or debris on the road. It’s also a popular choice for high-performance cars, luxury vehicles, and those driven in demanding environments.
10 mils: At 10 mils, this PPF is the thickest option available and offers the highest level of protection. It’s typically used on high-end vehicles, race cars, or those exposed to extreme conditions, such as frequent off-roading adventures. While this thickness may be more noticeable on the vehicle’s surface, it delivers superior defense against damage, ensuring your car’s paint remains pristine even in the harshest environments.