The only lubricant recommend by Harken "for anything that moves". Blocks,
travelers, sheaves. with or without ball bearings even sliding hatches and drawers.
Text from the package: Sailkote is the latest advance in high-tech PTFE dry lubricant technology. Bonds tenaciously to almost any surface. Reduces wear and lasts up to 10 times longer than Teflon additives, oil or wax-based lubricants. supplies clean durable protection designed to repel water, salt, dirt, and grime. Inhibits corrosion and mildew. Avoid contact with decks or surfaces where non-slip or grip is required.
8 oz. spray can
Since this is classified as a hazardous material, it can only be shipped via UPS ground to the continental US and Canada. It cannot be shipped to foreign addresses, Hawaii or Alaska.