This past weekend I went out and got caught in the rain...my boots held up for a few hours but then out of nowhere they became NON-water-proof. Does this mean that my boots are now no longer water-proof unless I buy the nixwax stuff and re-water-proof them?

I'm trying to figure out if I need to do that for sure before my next trip.

I should say that I'm wearing Scarpa Kailash GTX boots. They're made of nylon and some other fabric.