Anyone use this stuff?:    (You need to Login or Register to view media files and links);   (from the folks that make sno-seal)
i wouldn't count on it to be completely waterproof, but to have water adhere less to some items like packs, tackle bag, camp chair, etc. would be ok.

i switch between that stuff and the kiwi brand spray. whatever is on sale at the time. they work about equal from my experience. i pick up 3 cans a few weeks before my trip when i pull everything out and check it over. the tent rainfly gets a full can, the tent bathtub gets a can (heavy on the corners/seams) and then another can goes on my pack/pants/shirt/shoes/anything i have laying around.

gotta let that stuff air out for a bit(after its completely dry) before you pack it away, i usually leave my stuff on a clothes line or in the garage for 3-4 days. then pack up the tent with a few dryer sheets so its smells fresh!