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Farnam Endure Gold Killer Horse Fly Spray, 32-fl oz bottle

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About This Item

Details

  • Formulated with EPA-approved acetamiprid and etofenprox, this next-generation equine fly spray provides fast-acting and long-lasting protection.
  • Kills and repels a variety of flies, including house, stable, face, horn, and black flies, as well as biting midges, gnats, mosquitoes, and ticks.
  • 6 active ingredients work together to provide reliable fly control and continued protection for up to 14 days.
  • Delivers quick knockdown of horn and face flies and continues working through heat, sweat, and turnout conditions.
  • Provides residual fly control for up to 14 days and repels horn, face, and house flies for up to 12 hours, reducing the need for frequent reapplication.

Ingredients

Flies Adapt. Farnam Answers. Two New Breakthrough Ingredients in Fly Control.
Etofenprox, acts on insect nervous systems as a sodium channel modulator, leading to death. Acetamiprid, a next-generation agent that kills flies on contact and ingestion. It works even against resistant populations.
Kills for up to 14 days. Repels for hours. House flies, horn flies, biting flies, midges, mosquitos and even ticks all meet their match with Endure Gold, only from Farnam.
Working Together to OUTSMART Resistant Flies. THREE ADULTICIDES. Our multi-mode formulation breaks through resistance. FIELD TESTED. Proven effective in real-world conditions. TWO REPELLENTS. Form a protective barrier that keeps flies from landing or feeding. LONG-LASTING PROTECTION. Sustained control that keeps working long after application. ONE SYNERGIST. Boosts the power of the active ingredients to hit harder and work smarter.
Find the Right Fly Sprays for Your Horse. Endure Gold Killer Fly and Mosquito Control. Farnam’s maximum-strength fly and mosquito solution provides more than typical sprays can deliver for 14 days or longer. Endure Sweat-Resistant Fly Spray. The go-to performance spray for long-lasting hot weather, heavy sweating, and rainy days. Bronco Fly Spray Plus Citronella. Water-based everyday protection for early spring and routine fly days when you want solid coverage. Repel-X Insecticide & Repellent. Ready-to-use everyday protection for quick barn-and-turnout touchups. Equisect Water-Based Botanical Fly Repellent. The daily natural spray: botanical, water-based protection…the natural choice in fly sprays.

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Questions & Answers

1 Customer Questions

Is this waterproof/water repelling?

Reviews
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4.4
Rated 4.4 out of 5 stars
28 Ratings
Terms & Conditions

24 Customer Reviews

Rated 5 out of 5 stars
By Amber on May 15, 2026
Received Free Product

New Nozzle is Fantastic

This spray is worth it for the nozzle alone!! Instead of shooting out in a stream or even a spray, the nozzle allows the product to come out more of like a mist

This spray is worth it for the nozzle alone!! Instead of shooting out in a stream or even a spray, the nozzle allows the product to come out more of like a mist. I think this is a great help for animals who are sensitive to the surprise of traditional spritz bottles. I also appreciate the mist type application, because the smaller drops seem to make the spray stay on the hair, rather than beading down. On top of that, this fly spray works and lasts the longest out of several that I've tried. I'll definitely be using this from now on and would absolutely recommend it to anyone. ... oh and occasionally my dogs will roll in the pasture so I give them each a quick one or two sprays and it works great for their comfort, too!

Rated 4 out of 5 stars
By HorseDogMom on May 24, 2026
Received Free Product

Effective for one day and doesn't smell strong

I do really like that the smell isn't anywhere near as strong as some of the other popular fly spray products. It does seem to work right away, deterring the tiny

I do really like that the smell isn't anywhere near as strong as some of the other popular fly spray products. It does seem to work right away, deterring the tiny gnat-type flies as well as typical barn flies. However, here in South Texas where flies take their jobs very seriously, it doesn't work any longer than any other commercial fly spray I've used. I still have to use it every day to keep the flies off my boy. So, I just can't give it 5 stars but a solid 4 stars is totally legitimate.

Rated 5 out of 5 stars
By Kaitlin on May 12, 2026
Received Free Product

Keeps the flies away

I think my horse attracts every single fly within a 50-mile radius, even when it’s cold enough that you think flies should all be dead and gone. I’ve tried multiple

I think my horse attracts every single fly within a 50-mile radius, even when it’s cold enough that you think flies should all be dead and gone. I’ve tried multiple different sprays and so far Farnham Endure Gold actually provides lasting protection. Everything else keeps them away for about 5 minutes before she is back to stomping and tail swishing (even with fly boots and a mask on). After spraying with this spray, they circle around and, at most, land for a second and then leave right away before she reacts.

Rated 5 out of 5 stars
By Carlene on Feb 28, 2026

Game Changer

Absolutely hands down the best fly spray I have ever used. Sprayed on my mare and nothing landed on her for days (was relatively warm and dry). Finally something

Absolutely hands down the best fly spray I have ever used. Sprayed on my mare and nothing landed on her for days (was relatively warm and dry). Finally something that works!

Rated 5 out of 5 stars
By Hay Hudson on May 24, 2026
Received Free Product

Fantastic Fly Spray!

This has been the best fly spray I have ever tried and I have tried pretty much all of the brands. It worked super well keeping all of the flys off of my horses

This has been the best fly spray I have ever tried and I have tried pretty much all of the brands. It worked super well keeping all of the flys off of my horses and was very long lasting. The only thing I didn’t like was the only option was a mist, I would also like the direct stream spray option as well.

Rated 4 out of 5 stars
By Alison on May 19, 2026
Received Free Product

Would be 5 stars except for the smell

It seems effective. I usually use an oil based fly spray aince it gets so hot and the horses sweat. This spray feels effective throughout the entire ride or turn

It seems effective. I usually use an oil based fly spray aince it gets so hot and the horses sweat. This spray feels effective throughout the entire ride or turn out. Biggest downside is the smell. It is very chemically woth no citronella to mask it.

Rated 5 out of 5 stars
By Energy on May 27, 2026
Received Free Product

Fly spray

I love this product. It keeps the flys and mosquitoes away as well as fleas and ticks. Its easy to use and personally i like the smell. My horse is not bothered

I love this product. It keeps the flys and mosquitoes away as well as fleas and ticks. Its easy to use and personally i like the smell. My horse is not bothered by flys and my dogs are tick free also

Rated 4 out of 5 stars
By Snoopy2 on May 19, 2026
Received Free Product

Another solid product in the Endure line,

The first thing that I noticed was that the sprayer nozzle’s spray/off print was hard to read. However, once I figured out which side was the spray that I wanted,

The first thing that I noticed was that the sprayer nozzle’s spray/off print was hard to read. However, once I figured out which side was the spray that I wanted, the sprayer itself was of good quality. The fly spray itself spells faintly of citronella. Not overpowering, but noticeable and pleasant to my senses. I’m not sure if there is actually citronella in the product, but that is the scent that I got from it. The verdict is still out on how effective it is since I’ve only used it a couple of times, but if it is anything like the original Endure, I am thinking that I will enjoy it a lot!

Rated 5 out of 5 stars
By BFBarker on May 12, 2026
Received Free Product

NO FLIES!

Sprayed this on our horses in the evening. Next day, no flies when we saddled up! I am interested to see if it has any effect on mosquitoes. Smell was not offensive

Sprayed this on our horses in the evening. Next day, no flies when we saddled up! I am interested to see if it has any effect on mosquitoes. Smell was not offensive and it dried quickly.

Rated 5 out of 5 stars
By DBank on May 12, 2026
Received Free Product

Really works!

This fly spray really works! Usually I find myself spraying my gelding almost daily. I’ve used this one only twice and I am seeing a lot less flies on him despite

This fly spray really works! Usually I find myself spraying my gelding almost daily. I’ve used this one only twice and I am seeing a lot less flies on him despite it being peak season.