The last time I did a Schulz action I did a little experiment.
I recovered a few of the pouch pneumatics with the nylon cloth from
Schaff.  It is not the Bilon from PPCo.  It seemed to be thinner and
more flexible than the pouch cloth that PPCo had at the time.

I have used nylon for many years for regular pneumatics with no
problems.  Schaff no longer carries it, but APSCO does.

Jeff Davis,
Seattle WA