Super-Kleer is a great fining agent to use since it is two different compounds and they attract both positive and negative particles and you need to degas well before using or it will not be effective. RJ Spagnols and Cellar Craft both use this fining agent in their kits and as others have said it works great on country wines.
It contains Kieselsol and Chitosan:
"Kieselsol is a proprietary name for a fining agent belonging to the class of silica dioxides and has an action very similar to that of bentonite. Silica dioxides electrostatically bind with positively charged proteins in wine and initiate flocculation and settling.
Chitosan is a non-proteinaceous fining agent, a polysaccharide of the Sucrose Polymer family. It is derived from chitin extracted from ocean shellfish, the same organic material that makes up fingernails and human hair. It works by a process of molecular adsorption, where the Chitosan has an electrical charge, which attracts oppositely charged particles clouding the wine, binding them and pulling them out of suspension.
It s also used as a food additive and dietary supplement. Although it is derived from shellfish, there is absolutely no danger of any allergic reactions to the product, as there are no allergens left after the Chitosan is processed."