10 Best Fly Repellents 2025 in the United States

The Country Vet FarmGard Permethrin Concentrate is a versatile and powerful insecticide designed for both indoor and outdoor use. It contains a 13.3% permethrin concentration, which is higher than many similar products, allowing it to deliver 33% more finished product and effectively control pests for up to 4 weeks with a single application. This makes it a cost-effective solution for those managing multiple animals or large areas.

The product is suitable for use on a variety of animals, including cattle, horses, sheep, goats, swine, poultry, and dogs, and can be applied in several ways, such as a spray, dip, or sponge-on application. Additionally, it can be mixed with oil for back rubber use, providing flexibility in its application. The coconut scent is a pleasant touch, especially for those who are sensitive to strong chemical smells.

Users should exercise caution due to its strong formulation, particularly around pets and humans with sensitive skin. The product is also worth noting for its environmental impact; while it is effective, permethrin can be harmful to aquatic life, so it should be used responsibly. This insecticide is best suited for users who need a robust, long-lasting solution for pest control in both farm and home settings.

Raid Flying Insect Killer 7 is a spray designed to quickly kill flying insects like flies, mosquitoes, wasps, and hornets both indoors and outdoors. It uses active ingredients d-Phenothrin and prallethrin, which are common insecticides that act fast on contact. Its spray formulation makes it easy to apply directly onto insects, though you should keep it a few feet away from walls and fabrics to avoid stains or damage. The product offers immediate knockdown rather than long-lasting protection, so you might need repeated use in problem areas. One nice feature is its pleasant 'Outdoor Fresh' scent, which is less harsh than typical insecticide odors.

On the safety side, it contains petroleum distillates and sodium nitrite, meaning it should be used carefully to avoid skin irritation and kept away from children and pets. While effective, this spray isn’t designed as a personal repellent but rather for treating spaces and surfaces. Regarding environmental impact, it contains chemicals that can be toxic to beneficial insects and aquatic life, so use with caution and follow disposal instructions. This product is best suited for people looking for a quick and easy way to eliminate flying bugs around their home and yard but may not be ideal if you want long-term prevention or a natural option.

The Absorbine UltraShield EX 32oz Sprayer Insecticide is a robust fly-repellent suitable for use on horses, dogs, and premises. One of its main strengths is its ability to kill and repel over 70 species of pests, including flies, mosquitoes, ticks, and fleas. The formulation is water-based and ready-to-use, eliminating the need for mixing, which can be a real time-saver.

Its UltraBond Technology provides weatherproof protection for up to 17 days, making it highly durable. Additionally, the product includes sunscreens and coat conditioners, which is an added benefit when used on animals exposed to the sun. Its made-in-the-USA tag assures a level of quality and compliance with safety standards.

While it offers extended protection, the scent might be a point of contention for some, as insecticides often have strong odors. Users looking for a strong, long-lasting insecticide with added protection features for their animals and premises may find this product meets their needs well.