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Horse Fly Repellents

10 Best Horse Fly Repellents 2026 in the United States

#1

Winner

10.0 score

Wondercide - Outdoor Pest Control Spray with Natural Essential Oils - Mosquito, Ant, Flea, Tick, Insect Repellent, Treatment, Killer - Safe Around Pets Kids 32 oz

5%OFF

Wondercide - Outdoor Pest Control Spray with Natural Essential Oils - Mosquito, Ant, Flea, Tick, Insect Repellent, Treatment, Killer - Safe Around Pets Kids 32 oz

Wondercide

10.0 score

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The Wondercide Outdoor Pest Control Spray is a natural, plant-based solution that uses cedar oil to kill and repel a wide range of insects, including flies, making it a reasonable choice for managing horse-flies and other pests in outdoor spaces. Its spray formulation attaches directly to a garden hose, allowing easy and quick application over large areas (up to 5,000 square feet), which is convenient for treating yards or pastures.

Rating
10.0
Chosen by1,322
Active Ingredients
Formulation Type
Duration of Effectiveness

Most important from
10216 reviews

Active Ingredients
The cedar oil formulation leaves a fresh, pleasant scent that enhances outdoor areas without harsh chemical odors.
Formulation Type
The cedar oil formulation leaves a fresh, pleasant scent that enhances outdoor areas without harsh chemical odors.
Duration of Effectiveness
It significantly reduces mosquito bites by 70-80% and keeps outdoor spaces comfortable for weeks, though it requires regular reapplication.
Water Resistance
Effectiveness diminishes after rain, so timely reapplication is necessary to maintain control during wet weather.
Safety and Skin Sensitivity
The product is safe for pets, children, and beneficial insects like bees, offering peace of mind for families and environmentally conscious users.
Ease of Application
The spray easily attaches to a garden hose and covers a typical yard within 15-20 minutes, making application simple and convenient.
#2
9.1 score

Absorbine UltraShield EX Combo 32oz Sprayer + 128oz Refill Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

5%OFF

Absorbine UltraShield EX Combo 32oz Sprayer + 128oz Refill Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

Absorbine

9.1 score

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The Absorbine UltraShield EX Combo offers strong protection against a wide range of insects including flies, mosquitoes, ticks, and more, thanks to its active ingredients—pyrethrins, piperonyl butoxide, and permethrin—which are common and effective for insect control. This ready-to-use, water-based spray is designed specifically for horses, but also safe for use on dogs and around barns or premises. One big plus is its weatherproof UltraBond Technology, providing up to 17 days of insect protection even in challenging conditions, which helps reduce the need for frequent reapplications.

Rating
9.1
Duration of Effectiveness
Safety and Skin Sensitivity
Formulation Type

Most important from
3813 reviews

Duration of Effectiveness
Offers effective, long-lasting protection that keeps flies and other insects away for several days with just one application.
Safety and Skin Sensitivity
The pleasant citronella scent is well-liked and not overpowering, making it comfortable for animals and handlers alike.
Formulation Type
Water-based formula avoids greasiness and is preferred over oily alternatives for a cleaner feel on the coat.
Ease of Application
Application once a day or every few days is sufficient to maintain insect control, even in areas with heavy fly presence.
#3
8.8 score

Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

10%OFF

Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

Absorbine

8.8 score

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Absorbine UltraShield EX is a robust horse-fly repellent that also targets over 70 other pests including mosquitoes, ticks, and fleas. One of its key strengths is its formulation; it is ready-to-use and water-based, eliminating the need for mixing before application. This makes it easy to apply on horses, dogs, and even on premises like barns. Additionally, the product boasts weatherproof protection for up to 17 days, which is enhanced by UltraBond Technology, making it effective even in varying weather conditions.

Rating
8.8
Active Ingredients
Formulation Type
Duration of Effectiveness

Most important from
3813 reviews

Active Ingredients
The inclusion of sunblock and lanolin not only protects animals but also makes their coats shiny and sleek.
Formulation Type
The product's versatility as both a horse spray and a premise spray is highly valued for keeping barns bug-free.
Duration of Effectiveness
This stuff actually works! It repels and kills bugs instantly, providing relief for horses with allergies.
Safety and Skin Sensitivity
The spray is effective on a wide range of pests, including fleas on dogs, bringing immediate relief.
Ease of Application
It makes a noticeable difference in reducing gnats and other pests, with a pleasant scent that enhances the environment.

Top 10 Best Horse Fly Repellents 2026 in the United States

#1

Winner

10.0  score
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Wondercide

Wondercide - Outdoor Pest Control Spray with Natural Essential Oils - Mosquito, Ant, Flea, Tick, Insect Repellent, Treatment, Killer - Safe Around Pets Kids 32 oz

Active Ingredients: cedar oil
Formulation Type: spray
Safety and Skin Sensitivity: safe for pets, kids, beneficial insects
Ease of Application: attaches to garden hose, quick use

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5% OFF

Chosen by 1322 this week

#2
9.1  score
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Absorbine

Absorbine UltraShield EX Combo 32oz Sprayer + 128oz Refill Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

Active Ingredients: pyrethrins, piperonyl butoxide, permethrin
Formulation Type: Liquid
Duration of Effectiveness: up to 17 days
Water Resistance: weatherproof UltraBond Technology
Safety and Skin Sensitivity: safe for animals 12+ weeks
Ease of Application: ready-to-use, no mixing

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5% OFF
#3
8.8  score
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Absorbine

Absorbine UltraShield EX 128oz Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

Formulation Type: Ready-to-use, water-based
Duration of Effectiveness: 17 days
Water Resistance: Weatherproof
Safety and Skin Sensitivity: Multiple sunscreens and conditioners
Ease of Application: Easy to apply

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10% OFF
#4
8.2  score
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Farnam

Farnam Endure Fly Spray for Horses - Long-Lasting Sweat-Resistant Fly Repellent, Repels Flies, Mosquitoes, Gnats and Ticks, Up to 14 Days Fly Control - 128 oz Refill

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5% OFF
#5
7.9  score
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Wondercide

Wondercide - Mosquito, Tick, and Insect Repellent with Natural Essential Oils - DEET-Free Bug Spray and Killer - Safe for Family - Peppermint 2-Pack of 4 oz Bottle

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5% OFF
#6
7.9  score
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Pyranha

PYRANHA 1-10 HP Concentrate Refill 2.5 Gallon for 55 Gal Automatic Spray Systems - Barn Indoor Fly Control | Repels Horn, Deer, Horse, Stable, & Face Flies, Midge

Active Ingredients: pyrethroids
Formulation Type: concentrate
Water Resistance: yes
Safety and Skin Sensitivity: test a small area first
Ease of Application: requires mixing

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#7
7.6  score
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Formula 707

Formula 707 MultiFly Feed-Thru Fly Control Pellets for Horses - Palatable & Safe Fly Population Reduction (5 lb Bag - 91 Servings)

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5% OFF
#8
7.3  score
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Absorbine

Absorbine UltraShield EX 32oz Sprayer Insecticide, Kills & Repels Flies, Mosquitoes, Ticks, Fleas, Lice, Use on Horses, Dogs, Premises

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26% OFF
#9
7.0  score
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Pyranha

PYRANHA Wipe N' Spray for Horses - Oil-Based Long Lasting Fly Control Repels Horn, Deer, Horse, House, Stable, & Face Flies, Ticks, Mites, Mosquitoes, Gnats & Lice, 1 Gallon

Active Ingredients: citronella
Formulation Type: Spray
Safety and Skin Sensitivity: No celery allergens
Ease of Application: Spray on

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#10
7.0  score
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Farnam

Farnam Tri-Tec 14 Fly Spray for Horses – Long-Lasting Insect Repellent Kills and Repels Flies, Gnats, Ticks & Mosquitoes, Conditions Coat – Up to 14 Days Protection – 128 oz

Active Ingredients: Permethrin
Formulation Type: Liquid
Duration of Effectiveness: Up to 14 days
Water Resistance: Water resistant
Safety and Skin Sensitivity: Wash hands; avoid horses for consumption
Ease of Application: Spray or wipe application

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22% OFF
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Buying Guide for the Best Horse Fly Repellents

Choosing the right horse-fly repellent is crucial for ensuring the comfort and health of your horse. Horse-flies can cause irritation, stress, and even transmit diseases. When selecting a repellent, it's important to consider various factors to find the best fit for your horse's needs. Here are some key specifications to look at and how to navigate them.
Active IngredientsActive ingredients are the chemicals or natural substances that repel or kill horse-flies. This spec is important because it determines the effectiveness and safety of the repellent. Common active ingredients include DEET, permethrin, and natural oils like citronella. DEET and permethrin are highly effective but can be harsh on sensitive skin, while natural oils are gentler but may need more frequent application. Choose an active ingredient based on your horse's skin sensitivity and the level of fly infestation.
Formulation TypeFormulation type refers to the form in which the repellent is available, such as sprays, wipes, gels, or lotions. This is important because it affects ease of application and coverage. Sprays are quick and cover large areas, wipes are convenient for targeted application, gels provide long-lasting protection, and lotions can be soothing. Consider your horse's temperament and the areas you need to cover when choosing a formulation type.
Duration of EffectivenessDuration of effectiveness indicates how long the repellent will work before needing reapplication. This is crucial for maintaining continuous protection. Some repellents last for a few hours, while others can provide protection for several days. If your horse spends a lot of time outdoors or in areas with high fly activity, a longer-lasting repellent may be more suitable. For shorter outings or less infested areas, a shorter duration may suffice.
Water ResistanceWater resistance refers to the repellent's ability to remain effective after exposure to water, such as rain or sweat. This is important for horses that are active or live in humid climates. Water-resistant repellents ensure that your horse remains protected even when wet. If your horse sweats a lot or is often exposed to rain, choose a water-resistant repellent to maintain effectiveness.
Safety and Skin SensitivitySafety and skin sensitivity are about how gentle the repellent is on your horse's skin. This is important to prevent irritation or allergic reactions. Some horses have sensitive skin and may react to certain chemicals. Look for repellents labeled as safe for sensitive skin or hypoallergenic. If your horse has had reactions to repellents in the past, opt for natural or milder formulations.
Ease of ApplicationEase of application refers to how simple and quick it is to apply the repellent. This is important for ensuring that you can effectively cover your horse without causing stress. Some products come with easy-to-use spray nozzles, while others may require more effort to apply evenly. Consider your own convenience and your horse's behavior when choosing a product that is easy to apply.

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