"This fining is a gelatinous substance derived from the internal membranes of fish swim bladders. Isinglass is positively charged but its effectiveness in settling yeast will vary with the strain of yeast being employed. Follow the instructions that will come with it.
Positively charged fining agent. Liquid isinglass is good for clearing up white wines, particularly those that have been aged with oak. Stir 1 fluid oz into 6 gallons of wine and allow 2-3 days to clear. Store tightly sealed in a cool place.