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Sylo Insecticide (Cypermethrin 25.4%)

Sylo is a cypermethrin concentrate for outdoor pest barriers. Read the label before buying.

Updated Nov 1, 2026. Edited by: Ilyass Ben Hakim.

Where to buy

Solutions Pest and Lawn and pest supply stores sell Sylo. Some states limit shipping of pesticides, so check before ordering.

Professional insight

Pest control buyers check the EPA number and active percentage first. Brand names often hide the same chemistry.

Match EPA Reg. No. 88746-2 on the jug.
Compare cost per ounce of active cypermethrin, not jug price.
Confirm the label allows your target pest and site.
Check your state's pesticide rules before shipping.

Check the label

Active ingredient: cypermethrin 25.4 percent.
EPA registration number printed on the container.
Signal word and first aid section are readable.
Your target pest and site are listed on the label.
Mix rate per gallon of water for that pest.
Outdoor use directions and any indoor limits.
Container seal is intact and the jug is not leaking.

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Sylo insecticide at a glance

Active ingredient: Cypermethrin 25.4%
Chemical class: Synthetic pyrethroid
EPA Reg. No.: 88746-2; Registered as Solutions Cypermethrin 25.4

Sylo is an emulsifiable concentrate. You dilute it in water and spray it as a residual barrier.

Tools you will need

Handheld pump or backpack sprayer used only for pesticides.
Measuring cup marked in fluid ounces.
Chemical resistant gloves and eye protection.
Long sleeves, long pants and closed shoes.
Clean water for mixing and rinsing.

Safe use

1Read the full label and safety data sheet first.
2Mix only the amount you will use that day.
3Spray on a calm day with no rain forecast.
4Keep people and pets away until surfaces dry.
5Never spray onto water, drains or flowering plants.
6Wash hands and clothes after spraying.

Storage

Keep Sylo in its original labelled container.
Store it locked away from children and pets.
Keep it away from food, feed and heat.
Do not reuse the empty jug for anything.
Follow local rules to dispose of leftovers.

Common questions

Can I spray Sylo indoors?: Sellers market it for outdoor use. Follow what your label allows.
Is Sylo the same as other cypermethrin brands?: Many share the active ingredient. Percent and label uses can differ.
Who makes Sylo?: The EPA record lists Inova Chemicals. Solutions Pest and Lawn sells it.
What if it gets on my skin?: Follow the first aid steps on the label. Call poison control if unsure.