This is a "waterproof" zipper. However, at the end of the zipper, there is always a small hole/gap where the zipper doesn't close completely due to the nature of the construction of the bag. I am sure there are fancier techniques that would allow for a more waterproof zipper installation but that is beyond me at this point.
The sagebrush bags are nice but for their cost you could have several rolltop dry bags.
The sagebrush bags are nice but for their cost you could have several rolltop dry bags.