Plastic Zipper Grease YKK Sold in ea.

Did you know the replacement cost of a drysuit zipper could cost up to $366? Lubricating your drysuit zipper regularly is the BEST thing you can do. Protect your investment! The best way to protect your waterproof zipper is to keep it lubricated with a protective layer of Plastic Zipper Grease for your YKK plastic zipper. Before diving your drysuit, put a drop of zipper grease on the plastic dock. Then close and open your zipper.

For the W-seal (Closed-end) application, 
1. Apply the lubricant to the top-seal as indicated in the diagram.

Only use on plastic YKK zippers. Not for use on DUI/YKK metal zippers.