that's buried many mils under the outer surface...
Maybe so these days, but not for a long time.
Note: I slightly mistyped. I said it was to contain the glass shards. The windshield has a goo between the two panes that does that. Probably what you are thinking of.
But, several years ago, they started bonding a super thin mylar sheet on the outside of the glass on the inside of the car.
I have reread that sentence a couple of times, its right, just does not sound right......
Anyway, I found that out the hard way. I took my father's Lincoln into a big carwash.
Got the full package.
The order taker wrote an "A" on the inside of the windshield with a grease pencil to indicate what treatment it was to get.
Afterward, there was a faint outline of the letter scratched into the windshield.
It was low enough down, and faint enough my father never noticed it. I could not figure out how a grease pencil, even with some dust stuck to it could scratch glass.
Went to a local glass shop down the street from my work, and they told me about the mylar.
Of course, they may not do it anymore. That was about 1998-2000.
Now you have me wondering. I'm renting a building to a company that replaces windshields among other car stuff, and its time for rent.
I'll ask and get back.