I think what Martinfocazio meant is that if the side windows used laminated glass, it wouldn't work. Most cars don't use laminated glass on the side windows, but must use it on the front window.

I think he is also suggesting that some cars may use laminated glass on the side windows and thus it wouldn't work in that case.

If indeed some cars use laminated glass on side windows, the product website would be wrong to make the statement without some sort of disclaimer.

Either way, it probably makes sense to determine what kind of glass in the side windows for your own vehicle.

-john