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 lubricates and restores ALL types of zippers. Contains no silicone or paraffin. 0.5 oz. ZippyCool Stick.