It dries invisible, has a slight odor, will last up to a month and is generally the choice when spraying a lot inside. The Wettable Powder is white and will leave a slight residue on dark surfaces, has no odor, will last a week or two longer than the Emulsifiable Concentrate and is generally used outside where the extra length residual is an advantage. Keep in mind that either form can be used inside or outside. The wettable powder is able to provide a little longer residual but there is the possibility of a visible residue on dark surfaces. The following is a list of packaging and costs for both forms.
Shipping is additional.
Cypermethrin Emulsifiable Concentrate. Cypermethrin Wettable Powder.