Don't have a Drizone but I have found paraffin to be a good lube for zippers. They run smoother and the wax does not come off on contact with equipment or clotheing. Rub the bottom of a candle on the zipper to test it.
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Not really the same thing -- the DryZone "zipper" has some interlocking rubber which provides the waterproofness. Paraffin or other wax may work "okay" but the lube I think is just some silicon lube. If I weren't a lazy f**k I'd go upstairs and read the bottle :-/