How To Get Rid Of Fleas
Flea Insecticide Concentrates
When fleas have spread beyond a single room or you need to treat a yard, a kennel, or a multi-unit property, a pre-mixed aerosol runs out fast and gets expensive. A flea insecticide concentrate solves both problems by giving you gallons of finished spray from a single bottle, plus the flexibility to adjust the mix rate for the surface you are treating.
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Transport Mikron Insecticide FmcSpecial Price $92.65 Regular Price $99.86 -
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Why a Flea Insecticide Concentrate Outperforms Ready-to-Use Sprays
A flea spray concentrate gives you up to 10 times more finished product per dollar compared to ready-to-use bottles. A quart of Permethrin SFR Insecticide yields 20 to 40 gallons of finished spray depending on the target pest and label rate. That is enough to treat the interior and exterior of an average home several times over.
Active Ingredient Categories
Most concentrates in this section fall into one of three chemical classes:
- Pyrethroids like permethrin, bifenthrin, deltamethrin, cyfluthrin, and esfenvalerate deliver fast knockdown and weeks of residual.
- Microencapsulated formulations such as Onslaught Microencapsulated Insecticide wrap the active ingredient in microcapsules that extend residual activity and reduce surface staining.
- Combination products such as Temprid FX Insecticide and Tandem Insecticide pair two actives to handle both adult fleas and resistant populations.
How to Mix and Apply Flea Concentrate
Read the label first. The label gives you the rate per gallon, the maximum number of treatments per year, and the surfaces approved for application.
Mixing Steps
- Fill the sprayer halfway with water.
- Add the measured amount of concentrate.
- Top off with water to the target volume.
- Pump or shake to mix thoroughly before spraying.
A pump sprayer with a fan-tip nozzle works well for indoor flea applications. For perimeter and yard work, a backpack sprayer or hose-end applicator covers larger areas faster.
Where to Apply Flea Insecticide
- Indoors: Carpets, baseboards, under furniture, closets, pet sleeping areas, and the cracks where flooring meets walls. Avoid food contact surfaces and food preparation areas.
- Outdoors: Foundation perimeter, shaded turf, under decks and porches, along fence lines, and around outdoor pet kennels. Skip areas in full sun where pyrethroids degrade fastest.
Always Pair With an IGR
Adulticide concentrates eliminate biting fleas but do little to flea eggs and pupae. Add a separate flea IGR concentrate to the same tank, or use a pre-mixed combo product, to break the full life cycle in one application cycle.
Round Out Your Treatment Program
A complete flea program reaches every stage of the life cycle and every place fleas live or travel.
- Use a flea aerosol for spot treatments and tight cracks where a sprayer cannot reach.
- Treat lawns and shaded yard zones with granular flea insecticides.
- Apply a flea spray for pets directly on dogs and cats.
- Add a flea dust for wall voids, basements, and crawl spaces.
- Combine everything with a flea control kit when starting from scratch.
Frequently Asked Questions
How much square footage will one bottle of flea concentrate cover?
A quart of standard concentrate mixed at label rate produces 20 to 40 gallons of finished spray, enough to cover thousands of square feet depending on the application surface. Heavy infestations and high label rates reduce this number, but concentrates still deliver far more coverage per dollar than aerosols or pre-mixed bottles.
Do I need an IGR if I am already using a flea insecticide concentrate?
Yes for any active infestation. Adulticide-only concentrates miss the egg and pupa stages, which can hatch and reinfest a treated home weeks later. Adding an IGR ensures no new generation reaches breeding age.
Can I use the same concentrate indoors and outdoors?
Many flea concentrates carry both indoor and outdoor labels, but check the specific product before applying. Permethrin SFR and FenvaStar Plus, for example, are both labeled for indoor and outdoor use. Some concentrates are restricted to one or the other.
How soon can pets and people return to a treated area?
Once the spray has fully dried, typically two to four hours depending on humidity and ventilation. Wet treated surfaces should never be touched. Allow extra drying time on heavy carpet and upholstered furniture.
How long will a flea concentrate keep working after application?
Most modern flea concentrates leave a residual that stays active for 30 to 90 days indoors and 14 to 30 days outdoors. Microencapsulated formulations like Onslaught extend that window, sometimes to 90 days outdoors and longer indoors.
Tackle Flea Infestations Cost-Effectively With Concentrates
Whether you are treating a single home, a row of rentals, or a kennel facility, the right flea concentrate stretches your budget while delivering professional results. Browse our concentrate selection above, or call our knowledgeable staff at 1-800-476-3368 for help matching a product to your square footage and surfaces.
