Check the listing for details. FermFast, DualFine Finings Clarifier, Beer, Wine and Spirits Clarifier. Color: clear, Condition: New. Listed at 3.99 USD. DualFine, Finings By: FermFast Two-Step Clarifier For Beer, Wine, Cider and Spirits FermFast DualFine Clarifier is suitable for clarifying all beers, wines, ciders and spirits. It is a highly effective two-step fining agent composed of liquid kieselsol and chitosan. Each component works by attracting particles of the opposite charge pos/neg charge. The kieselsol, also known as silicon dioxide, is negatively charged and the chitosan, which is derived from shellfish, is positively charged. Each package will treat 5 to 6 gallons/19-23 L. Contains: 2.2 fl. oz. (65mL) Usage: Treats 5g to 6g (19L to 22.7L) Grape Grain and Bean Home Brewing Supply is a retail store located in Manitowoc, Wisconsin. Check out our store for a full line of home brewing supplies. A trusted brewing supply. Family owned and operated since 2004. Store Hours Monday - Thursday 10am - 5pm Friday 10am - 6pm Saturday 10am - 4pm Sunday - Closed - All Hours or CST