Marine zippers have been described as "self lubricating", meaning that they continue to function just fine as long as they are zipped and un-zipped on a regular basis. Left unused for a period of time, zippers may dry out, flake, stick or break. From YKK, ZippyCool lubricated and restores ALL types of zippers. Contins no silicone or paraffin. 2 fl. oz. ZippyCool Stick.