There was PPF on the front bumper when I bought the car in 2010 - so now it's more than 12 years old.

I put PPF on the hood - it's 12 years old.

Both still look new.

The car is garaged and doesn't go through the harsh chemical of a car wash.

I use mild soaps and wax designed for PPF.

Many factors play into this, but it can last quite long. I am sure the materials that were used on my car (3M) at that time are much better than they were in 2010.