10 Best Horse Fly Sprays 2025 in the United States

The Absorbine UltraShield EX 128oz Insecticide is a potent option for those needing a robust solution to repel and kill a wide array of pests. It boasts a strong formula that can tackle over 70 types of insects, including flies, mosquitoes, ticks, and fleas, making it versatile for use on horses, dogs, and even around barns and premises. The product's UltraBond Technology ensures it remains effective for up to 17 days, which is notably long-lasting compared to many other products on the market.

It's ready to use right out of the bottle, requiring no mixing, which simplifies the application process. Additionally, the water-based formula is a plus for those looking for easy cleanup and less sticky residue. Its weatherproof properties mean it will remain effective even in less-than-ideal conditions. The inclusion of sunscreens and coat conditioners is a thoughtful touch, providing additional care for your animals' coats while protecting them from bugs and UV rays.

However, potential users should be aware that, while the product is powerful, it might not be the best option for very sensitive areas or animals with particularly sensitive skin. For those looking for a comprehensive and long-lasting insecticide, Absorbine UltraShield EX offers a wealth of benefits. It is particularly well-suited for horse owners who need a reliable, weatherproof solution with added coat care benefits.

Farnam Endure Sweat-Resistant Horse Fly Spray is designed to protect horses from a variety of biting insects, including flies, mosquitoes, and ticks that can spread diseases like Lyme Disease. Its main active ingredient is permethrin, a common and effective insecticide. One of the biggest advantages of this spray is its strong resistance to sweat and water, thanks to a special formula that binds to the horse’s hair. This means it can keep working even in hot, humid weather or after rain, which is great if your horse spends a lot of time outdoors or is active.

The spray can be applied all over the horse’s body, but for sensitive areas like the face, it's recommended to use a wipe to avoid irritation. This shows some care in how it should be used safely. The scent is described as pleasant, which is a nice touch since some sprays can smell too strong or unpleasant. The product promises to last up to 14 days between applications once protection builds up, but generally, reapplication every 5 to 7 days is advised, especially after washing or heavy rain.

Because it contains permethrin, it should be handled carefully and kept away from animals intended for human consumption. Also, while it protects well in sweat and water, you do need to reapply if the horse is washed or heavily rained on. The spray bottle is convenient and comes in multiple sizes depending on your needs. Some users might find that the spray requires liberal application to be fully effective, which could mean using more product than expected. This fly spray is a solid choice for horse owners looking for long-lasting, sweat-resistant protection that covers a wide range of pests. It suits horses in active or wet environments and those with some sensitivity around the face, provided application instructions are followed. The pleasant scent and ease of use make it user-friendly, although regular reapplication after washing is necessary to keep the protection strong.

The Farnam Tri-Tec 14 Horse Fly Spray offers a robust solution for protecting horses from a variety of pests including flies, gnats, mosquitoes, and ticks. The spray features multiple active ingredients, such as Permethrin, which provide an impressive duration of effectiveness, up to 14 days. This longevity makes it a convenient option for horse owners who need a reliable and long-lasting fly repellent. The product also includes coat conditioners, which contribute to a healthy shine on the horse's coat, adding an extra benefit beyond pest control. The easy pour gallon refill size is economical, making it a cost-effective choice for those with multiple horses or frequent usage needs.

Additionally, the product is designed to be versatile in its application, as it can be used both as a spray or a wipe, which is particularly useful for applying on sensitive areas like the horse's face. However, users should be cautious to avoid contact with the horse's eyes, nose, and mouth. The pleasant scent is a plus, making the application process more pleasant for both the horse and the owner. Although it boasts water resistance, the spray does require reapplication after heavy rains or washing, which could be considered a minor inconvenience. The Farnam Tri-Tec 14 Horse Fly Spray is highly rated by users for its effectiveness and ease of use, making it a strong contender for anyone looking to protect their horses from pests in an efficient and economical manner.