If you get in the water irregularly you can end up with salt buildup on your wetsuit zip and many an old suit, or boardbag has been binned just because the zip has ceased up (although modern large tooth plastic zips are a huge improvement over older styles). This stick just rubs onto a zip, lubricating and protecting against corrosion.
Manufacturers Description
Zip Tech™ High Performance, Stick Form Zipper Lubricant is a premier paraffin-free, silicone-free lubricant. The clear, semi-solid stick is the most sophisticated zipper lubricant formula available and is designed for all types of zippers on dry suits, environmental suits, wet suits and other equipment subject to submersion in water.
The universal formula is safe on all types of zippers and zipper skirts and gaskets including latex and synthetic rubber. Contains UV blockers. Paraffin and silicone free.
Examples of Zip Tech compatible materials: All types of metal, nylon and plastic zippers, other materials.