Weatherproof Fly Control That Lasts Up to 17 Days

Absorbine UltraShield EX Fly Spray is the most advanced formula Absorbine offers — built for riders who need serious, long-lasting protection in the toughest conditions. With UltraBond Technology, this weatherproof spray keeps working through rain, sweat, and turnout for up to 17 days, killing and repelling more than 70 species including biting flies, mosquitoes, deer ticks, gnats, and fleas. The ready-to-use, water-based formula won't attract dust and works on horses, dogs, and as a barn premise spray.

Multiple sunscreens and coat conditioners — including aloe and lanolin — protect skin and add shine while the formula does its job. Apply to stall walls, feeders, and trailer interiors to discourage flies from gathering before they ever land on your horse. Consistently voted a Chronicle of the Horse Reader's Choice favorite for fly protection.

Why Riders Choose UltraShield EX

• 17-day weatherproof protection — UltraBond Technology keeps the formula working through rain, sweat, and heavy turnout conditions.
• Kills and repels 70+ species — Targets biting and nuisance flies, mosquitoes, deer ticks, fleas, gnats, carpenter ants, and more.
• Multi-use formula — Safe for horses, ponies, dogs, and use on barn surfaces as a premise spray to eliminate fly breeding grounds.
• Sunscreen and conditioning built in — Advanced formula includes multiple sunscreens plus aloe and lanolin to protect and condition the coat.
• Water-based, won't attract dust — Ready to use straight from the bottle — no mixing required, and won't leave a sticky residue that pulls dirt into the coat.
• Made in the USA — Consistently recognized as a top reader's choice for fly control by equestrian publications.

Best For

Barn owners and trail riders looking for long-lasting, weatherproof fly protection that holds up through turnout, rain, and sweat without constant reapplication.

Frequently Asked Questions

Q: How long does UltraShield EX really last in wet or humid conditions?

UltraShield EX is formulated with UltraBond Technology, which bonds the formula to the hair shaft for up to 17 days of protection — even through rain, sweat, and high humidity. For best results, apply to a clean, dry coat and allow it to dry fully before turnout or work.

Q: Can I use this spray inside my barn or trailer?

Yes — UltraShield EX works as a premise spray for barn walls, stall surfaces, feeders, and trailer interiors. Spray surfaces before loading horses or around high-traffic fly zones to kill and repel insects on contact. This helps reduce the overall fly population in your barn.

Q: Is UltraShield EX safe to use on dogs?

Absolutely. The water-based formula is safe for dogs and ponies as well as horses. Use the same application method — spray lightly to dampen the coat, avoiding eyes and mucous membranes, and brush through for even coverage.

Q: How much product should I use per application?

Plan on about 45 sprays (approximately 2 ounces) per horse for full-body coverage. The coat should feel damp but not soaked. Shake well before use, and for best results, brush the hair up before spraying, then brush down to coat the entire hair shaft evenly.