Fly Deny® Fly Spray
Fly Deny® Fly Spray

This is an awesome fly spray! It sprays very well and my horses seem to be less bothered by flies.

Brittany

Verified buyer

Fly Deny® Fly Spray

$29.99

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Fly Deny's advanced technology provides water-based, sweat-resistant protection against flies, gnats, and mosquitoes for up to 14 days.

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90-Day Satisfaction Guarantee

Formulated for Horses

Made in the USA

Description:

Protect your horse from flies, gnats, and mosquitoes with Fly Deny® by Formula 707. This water-based, sweat-resistant fly spray offers lasting protection for up to 14 days, with a pleasant citronella scent that won’t overpower. The 360-degree sprayer ensures thorough coverage, making it easy to shield your horse from pests.

For optimal results, we recommend pairing Fly Deny® with Formula 707 MultiFly Feed-Thru Fly Control as part of a comprehensive fly management plan.

Return Policy:

We offer a 90-day 100% satisfaction guarantee on all of our products. This satisfaction guarantee extends to products purchased on our website directly. Products that are purchased from other sellers (e.g. Amazon, Chewy, brick & mortar) are subject to the return policies of their respective seller. Unopened products may be exchanged or returned (for order credit or full refund). Customer is responsible for return shipping. We allow exchanges and returns on open products at our discretion. The guarantee is also limited to your most recent purchase of a specific product (e.g. if you've been using a product for 5 months with a purchase every month, we will only refund your most recent purchase, even if purchase #3 and #4 are within the 90 days).

For more information on returning an item, please contact our customer service department at 800-525-8601. Thank you.

We ship within 2 business days of receiving an order, usually the next business day.

In the event of a return, please notify us that you are returning the product. We will always accept new, un-opened products within 90 days of the purchase date. Returning a product with no notification will result in no refund. For open or used product, we have a 90-day satisfaction guarantee. Please reach out to us and we will make things right!

Once initiating the return, please send the product to us within 30 days. Once the return is received, you can expect the funds to be received back on your credit card within a week. Customer is responsible for return shipping.

This is an awesome fly spray! It sprays very well and my horses seem to be less bothered by flies.

Brittany

Verified buyer

  • Directions

  • Product Facts

Shake well before using. To protect horses and ponies from Horse Flies, House Flies, Stable Flies, Face Flies, Horn Flies, Deer Flies, Gnats, Mosquitoes: Thoroughly brush the horse's coat prior to application to remove loose dirt and debris. For dirty horses, shampoo and rinse thoroughly. Wait until the coat is completely dry before applying this product. Formula 707 Fly Deny is sweat-and-weather-resistant, so it keeps working when the horse sweats, and after rainfall.
Active Ingredients Table
Ingredient Percentage
Cypermethrin CAS #52315-07-8 1.00%
Other Ingredients 99.00%
Total 100.00%

Equipped with Long-Lasting Technology

The active ingredient in Fly Deny is both stable and lipophilic, meaning it bonds well to oily or fatty surfaces. Since your horse's coat contains natural oils, Fly Deny adheres effectively and resists being washed off by rain or sweat. Its stable chemical structure also helps it withstand environmental stressors like sunlight and heat, lasting longer than other fly sprays and offering dependable, lasting protection.

Target the Pests That Irritate Your Horse

Protects Against Flies

Fly Deny provides powerful protection against biting flies, including stable flies, house flies, and horse flies, which can cause irritation, stress, and even transmit diseases between horses. By creating a long-lasting barrier, it helps keep biting flies at bay, promoting a calm and comfortable environment for your horse.

Protects Against Gnats

Gnats are notorious for causing itching and discomfort, especially around the face and ears. With Fly Deny’s cypermethrin-based formula, your horse enjoys dependable protection against gnats, reducing the chance of skin irritation and allowing them to enjoy their outdoor environment in peace.

Protects Against Mosquitoes

Mosquitoes aren’t just a nuisance; they can also spread diseases that impact your horse’s health. Fly Deny works effectively to repel mosquitoes, safeguarding your horse against potential bites and the risk of mosquito-borne illnesses. This added layer of protection ensures peace of mind for both horse and rider.

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Why Water-Based Fly Spray?
  • Powerful Insect Protection: Formulated with 1% cypermethrin, Fly Deny offers effective, long-lasting defense against a range of pests, including biting flies, gnats, and mosquitoes.
  • Comfortable, Lightweight Feel: Fly Deny’s water-based formula feels light on your horse's coat, so it won’t weigh them down or create an uncomfortable greasy layer.
  • Gentle on Skin: Suitable for horses with sensitive skin, Fly Deny’s water-based formula minimizes the risk of irritation, keeping your horse comfortable while providing strong protection.
  • Dries Quickly for Fast Application: Fly Deny dries quickly on the coat, making it easy to apply before rides or turnouts without worrying about residue transferring onto tack.
  • Residue-Free Protection: Unlike oil-based sprays, Fly Deny leaves minimal build-up, helping to keep your horse’s coat naturally clean and shiny without clogging pores.
  • Repels Dirt and Dust: The water-based formula is less likely to attract dust or dirt, keeping your horse’s coat looking fresh and clean for longer.

Precision Spraying for Effective Protection

Fly Deny’s spray trigger is designed with precision and durability in mind. Its high-quality construction ensures a smooth, reliable performance every time you use it. The trigger delivers a fine mist spray, allowing for even and thorough coverage of your horse’s coat. This not only ensures the product is applied efficiently but also prevents over-saturation, making each application clean, quick, and effective. It’s the perfect combination of performance and convenience, crafted to meet the needs of horse owners.

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Loved by thousands of horses and their people.

Formula 707 is the trusted choice of thousands of horse owners globally. From various disciplines and all ages, our community values the special connection that horses and humans have. We prioritize the health and happiness of your horse by formulating our supplements in collaboration with experienced veterinarians. Produced in our equine-exclusive facility, our products are tested for purity and potency. With Formula 707, you're choosing proven quality for your equine partner.

Two Complementary Tools for Effective Fly Management

Why are MultiFly and Fly Deny the ultimate duo? An integrated pest control program delivers optimal results, and these two solutions excel by tackling flies from complementary angles. Together, they create a powerful and effective strategy for pest management.

MultiFly Feed-Thru Fly Control
  • Targets the fly life cycle in the manure of treated horses
  • Reduces the fly population dramatically over time of house and stable flies
  • Fed to each horse in the barn

Fly Deny Fly Spray
  • Targets adult flies, mosquitoes, and gnats
  • Repels and kills adult flies
  • Can be used on a horse-by-horse basis
  • Kills flies that do not reproduce in manure, mosquitoes, gnats

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FAQs

What’s the active ingredient in Fly Deny? 

Fly Deny contains 1% cypermethrin, a proven insect-repelling ingredient that provides long-lasting protection against flies, mosquitoes, gnats, and other biting insects. 

How long does Fly Deny last once applied?

Fly Deny provides long-lasting protection for up to 14 days under ideal conditions. Its sweat-resistant formula helps it stay effective even during warm weather and activity. However, factors like heavy rain or frequent bathing may require reapplication for continued protection. 

Can Fly Deny be harmful for horses with sensitive skin? 

Fly Deny is designed to be gentle and effective, but every horse is different. If your horse has sensitive skin, we recommend patch testing a small area before full application. Avoid applying to open wounds or irritated skin, and discontinue use if any signs of irritation occur. If you have concerns, consult your veterinarian before use. 

Is Fly Deny water or oil-based? 

Fly Deny is a water-based fly spray. Its lightweight formula won’t leave a greasy residue and is designed for quick drying and comfortable daily use, making it a great option for all coat types. 

What are the benefits of using cypermethrin as the active ingredient in Fly Deny? 

Cypermethrin is a highly effective ingredient that provides long-lasting protection against flies, mosquitoes, gnats, and other biting insects. It works quickly to repel and kill pests on contact, helping to keep your horse comfortable. Unlike some fly sprays that require frequent reapplication, Fly Deny’s formula ensures extended coverage, so you can spend less time spraying and more time riding. 

Can you spray Fly Deny under tack?

Yes, Fly Deny can be applied under tack, but we recommend allowing it to fully dry before saddling up to prevent any potential irritation. Its water-based formula dries quickly and won’t leave a greasy residue, making it a great option for pre-ride application. 

How does Fly Deny compare to other fly sprays?

Fly Deny stands out from other fly sprays with its long-lasting, sweat-resistant formula that provides up to 14 days of protection. Unlike many oil-based sprays, Fly Deny is water-based, meaning it dries quickly without leaving a greasy residue. It contains 1% cypermethrin, a powerful insect repellent that works fast to kill and repel flies, mosquitoes, gnats, and other biting insects. Plus, it’s made in the USA with strict quality control to ensure a reliable product you can trust. 

How much does Fly Deny cost? 

Fly Deny costs $29.99 for a 32 oz bottle. 

Will Fly Deny kill fly predators? 

Fly Deny is designed to target flies, mosquitoes, gnats, and other biting insects on your horse, but like any insect control product, it may affect beneficial insects if they come into direct contact with the spray. To help protect your fly predators, we recommend applying Fly Deny directly to your horse and avoiding areas where fly predators are actively working, such as manure piles or compost areas. 

Can Fly Deny be used on other animal species? 

Fly Deny is formulated specifically for horses. While cypermethrin is commonly used in insect control products for various animals, we do not recommend using Fly Deny on other species unless directed by a veterinarian. Always check product labels and consult your vet before applying any fly spray to animals other than horses. 

Does Fly Deny repel or kill flies?

Fly Deny does both! It repels flies, mosquitoes, gnats, and other biting insects to keep them away from your horse, while also killing flies on contact for long-lasting protection. Its 1% cypermethrin formula provides an effective defense, helping to reduce the number of pests around your horse. 

Does Fly Deny hurt pollinators?

Fly Deny is designed to target flies, mosquitoes, gnats, and other biting insects, but it may be harmful to pollinators like bees and butterflies if they come into direct contact with the spray. To minimize impact, we recommend applying Fly Deny directly to your horse and avoiding spraying near flowers, gardens, or areas where pollinators are active. 

Does Fly Deny have a 90-day satisfaction guarantee?

Yes, Fly Deny has a 90-day satisfaction guarantee for bottles purchased from formula707.com. Note this policy excludes other retailers, such as Amazon, Chewy, and other stores. Additionally, this guarantee only applies to the most recently purchased unit. 

Is Fly Deny show safe? 

Yes, Fly Deny is show-safe and can be used on competition horses. It contains no banned substances, making it a reliable choice for keeping your horse protected in the show ring. However, we always recommend checking with your specific event or association’s regulations to ensure compliance. 

Is Fly Deny made in the USA?

Yes, Fly Deny is made in the USA. The bottles are assembled in-house in a separate building from our pelleted supplements to ensure quality control and consistency. 

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A Name That's Been Trusted for Over 
75 Years

When a man named John Ewing started an equine supplement called "Formula 707" in the mid-20th century, there wasn't much consideration for the benefits of feed supplements in horses.

Today, we continue his legacy with a full line of innovative products to support every horse.