DavesPestDefense Viper Insect Concentrate 4 (16 oz bottles) Cypermethrin 25.3% Viper EC is for use inside as a crack and crevice spray of nonfood areas including cabinets, windows, doors, closets, shelves, baseboards, and garages. Outdoors Viper may be applied to all areas as a broadcast spray. It has a bit of an odor to it so we recommend testing outside before applying inside. Mix Viper Insecticide at a rate of 1.3 oz per gallon of water and apply as a coarse spray to areas of pest infestation. Fill sprayer with the desired volume of water and add Martins Viper EC Insecticide. Close and shake before use in order to ensure proper mixing. Shake or re-agitate sprayer before use if spraying is interrupted. Make up only as required; repeat treatments when needed.