Chitosan Liquid Fining - 150ml - Enough to treat 6 gallons. Winexperts RED WINE fining agent! Chitosan - Clarifying Agent - 150 ml by Winexpert. Chitosan is useful in filtration situations, where one may need to remove suspended particles from a liquid. In combination with bentonite, gelatin, silica gel, isinglass, or other fining agents, it is used to clarify wine, mead, and beer. Added late in the brewing process, Chitosan improves flocculation, and removes yeast cells, fruit particles, and other detritus that cause hazy wine. Chitosan combines with colloidal silica (fine amorphous , nonporous, and typically spherical silica particles in a liquid phase) is becoming a popular fining agent for white wines because Chitosan does not require acidic tannins (found primarily in red wines) with which to flocculate. It is usually used in red wines though because it is more aggressive then Isinglass (white wine usage) due to the fact that most white wines are more delicate in flavor and color.