Bulk 4-Litre Permethrin Horse Fly Spray — Made in Canada

Extenda Shield 4L Refill Jug is the same trusted veterinary-grade insect-control formula in a bulk size — built for stables, ranches, lesson barns and high-volume horse operations. Save per millilitre versus the 1L pump bottle and never run out during fly season.

Why Buy the 4L Refill Jug

• Save per ml — equivalent of four 1L bottles at a lower cost-per-litre
• Refill any sprayer — pour into your existing pump, trigger sprayer or backpack unit
• Same proven formula — 0.5% permethrin + 1.0% piperonyl butoxide + 0.1% pyrethrins
• Made in Canada — formulated for Canadian climate and pest pressure
• Ready-to-use — no mixing, no dilution required

Pests Killed & Repelled

• Horse flies, stable flies, deer flies, face flies, horn flies
• Mosquitoes — supports West Nile and EEE vector reduction
• Ticks — Lyme disease vector control
• Lice, gnats, black flies, chiggers

Ideal For

• Boarding stables with 5+ horses
• Cattle ranches and beef / dairy operations
• Show barns and competition riders
• Trail-ride outfitters and tour operators
• Anyone refilling smaller sprayers throughout fly season

How To Use

Shake well. Pour into a pump or trigger sprayer. Apply as a coarse spray to wet the hair coat thoroughly — focus on legs, shoulders, neck, back, and tail. Avoid eyes, mouth, and open wounds. Re-apply as needed for continuous protection.

Active Ingredients

Permethrin 0.5%, Piperonyl Butoxide 1.0%, Pyrethrins 0.1%

Important Safety Information

Contains permethrin. Do NOT use on cats or species not on the label. Do not apply to foals under 3 months or to horses intended for slaughter. For external use on animals only. Keep out of reach of children. Veterinary use only. Consult a veterinarian if irritation occurs.

What You Get

One 4L (4000 ml) refill jug. Note: jug does not include a sprayer head — designed to refill existing sprayers.

Ships from Canada.