IO Star is an iodine-based sanitizer that can be used to sanitize all of your brewing or winemaking equipment. Used at a rate of 1 ounce per 5 gallons of water to achieve a concentration of 25 ppm in solution. Simply give clean equipment a 1 minute contact time in this solution to properly and safely sanitize any brewing or winemaking equipment. No rinse is required at this concentration. Trusted for years in the bottling, dairy and food industries, iodine-based sanitizers such as IO Star have proven their place in the homebrewer's arsenal of sanitizing supplies.