Molybdenum Disulfide Spray provides an excellent barrier coating for silicone rubber molds used for zinc casting. A thorough coating of Moly after every three or four pours helps to protect the silicone rubber from the corrosive effects of molten zinc.  Can also be used to prevent zinc and other metals from sticking to funnels and cover plates. 11oz. can. Contains acetone, butane, isopropyl alcohol, and molybdenum disulfide. Made in USA.