CSI Cyper WSP Cypermethrin Insecticide, Water-Soluble Packets 48ct (48 x .33oz) Cypermethrin 40% Cyper can be used in the following locatons; Commercial and Resdential Structures, Hospitals, Nursing Homes, Non-Food Handling Areas, and Outdoors. 1 tub yields 24-48 gallons. 1 gallon of finished solution is usually sufficient to treat a 2,000 sq. ft. home.