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.

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 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.