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Q&A Home

Kay from Dixon, Il writes,

How much Permethrin SFR do I use to make 1 gallon of spider spray?

What does 0.5% emulsion mean and how do I mix it in one gallon for spiders?


If you are spraying Permethrin SFR 36.8% outdoors or indoors, you will use 1 2/3 fl. oz per gallon of water. This is what the 0.5% emulsion means. If you were using it at a higher percentage, such as 2% emulsion, you would use 6 2/3 fl. oz. per gallon of water. Please let us know if you have any additional questions.

Answer last updated on: 08/10/2014

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