I have some gray ripstop (1.1, I believe) from WallyWorld that's a few yrs old that's been lying around and I can't tell if it's sil or DWR. It looks just like some sil & DWR I have. I know of several variations of silnylon so I'm lost.
Is there a conclusive way to ID this fabric? I don't want to use it for the wrong application!