I'm curious what people have done to waterproof fabrics that are normally not considered waterproof (or even those that are). I'm interested in what the treatments were, what type of fabric was used, and what the results were.

I guess there are probably two main considerations here - one, getting fabric to repel (bead) water which I assume will be greatly driven by the tightness of the weave. The other being trying to get fabric to resist absorbing water into it's fibers, mostly effecting how fast it dries.

I'm curious how various treatments might effect the look and feel of the fabric. For example, does it make the fabric stiffer, or change the color. How long does it last?

Your thoughts and experience are appreciated.

Thanks,

-john