They are fluid form and liquid grade cationic polyelectrolytes and used for the same purpose with powder grade cationic polyelectrolytes. They can perform at the field both better or worse in comparison with different wastewater characters due to differences of copolymerization technics and polymer chain structure eventough both form has the same cationicity and equivalent molecular weight values. Liquid grade cationic polyelectrolytes are not only used as they supplied but also applicable as soluted in water. In comparison with powder grade cationic polyelectrolytes , liquid grade ones are more advantagous in terms of solution preparation time required.