i would imagine that they use polymers
the same type used for bullet-proof glass or better
btw -- some of the polymers are actually
bomb proof
once its
on the glass
it becomes
part of the glass
one of the big selling points
i always thought
was that the weakness of your home was shifted from something relatively easy to breach
-- a breakable glass window
into something not so easy nor quick to get through
-- the walls
with a plastic brick house covered in that stuff
you'd have a nice bomb shelter with all the comforts of home
