Farnam Endure Sweat-Resistant Fly Repellent Horse Spray

By Farnam
Rated 4.7222 out of 5 stars


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$89.99Chewy Price
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About This Item


  • Provides up to 14 days of sweat-resistant protection against flies, mosquitos and ticks.
  • This spray helps prevent exposure to insects that transmit harmful bacteria and Lyme Disease.
  • Endure Sweat-Resistant Fly Spray is ideal for even the most challenging weather conditions, including heavy rain and muggy heat.
  • Use the easy-pour gallon jug for quick refills and long-lasting results.
  • Made with Repelock technology, this spray binds to the hair shaft for optimal protection.

See More



Play Video: Learn More About Farnam From Our Team of Experts
Learn More About Farnam From Our Team of Experts

About Farnam Endure Sweat-Resistant Horse Fly Spray

Powers Through Sweat

Keep bugs off from head to hoof. Endure provides up to 14 days of sweat-proof fly control. It helps protect your horse from diseases transmitted by flies, gnats, mosquitoes, and ticks. Choose from 15 oz. finishing spray, 32 oz. ready-to-use spray, easy-pour 128 oz. gallon refill, and the handy 3 oz. Endure roll-on for your horse’s eyes and ears.

Complete Protection

Ideal for protecting hardworking horses from insect pests in the most challenging conditions, Endure spray features special RepeLock conditioner to reduce biting and discomfort. It comes in an easy, ready-to-use spray bottle for even application and can even be applied in the rain and when your horse is sweating.

Create a No-Fly Zone

Farnam’s No Fly Zone horse products provide comprehensive pest protection. The three-step approach includes the SuperMask II horse fly mask to BLOCK insects from your horse’s face, Endure Sweat-proof Spray to REPEL pests, and SimpliFly Feed-Thru Fly Control to REDUCE flies. Together, they help keep insects away from your horse’s face and body, act as a safeguard against six types of flies, gnats, mosquitoes, lice, and deer ticks, and prevent the development of house and stable flies. 


The unique RepeLock conditioner in Endure spray helps ensure a fly-free zone, reducing biting and discomfort for your horse. The hardworking, sweat-resistant formula keeps on protecting, too—even in hot, muggy, sweaty conditions!

Easy Application

Applying Endure is easy—simply brush your horse’s coat, shake the product well, and spray. For application on the face, apply using a clean wipe and gloves, avoiding the horse’s eyes, nose, and mouth. If the horse is dirty, shampoo and rinse thoroughly first, making sure the horse is dry before application. Reapply every 5-7 days initially and then every 10-14 days for optimal coverage. You’ll also need to reapply if the horse is washed or exposed to heavy rain.

About Farnam

For over 75 years, Farnam has been a leader in equine care. Their mission has always been to strengthen the bond between horses and humans with simple, effective, and innovative solutions. Choose Farnam horse products to help make every moment of your time together happier, healthier, and more enjoyable.

Shop Farnam

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Top IngredientsCypermethrin, Pyrethrins, Piperonyl Butoxide...Water Based, Citronella ScentedCypermethrin, Cas #52315-07-8 1.00 % Other Ingredients: 99.00 %Lemongrass Oil Cedar Oil Peppermint Oil Geranium Oil Water Soap Citric Acid Sodium Benzoate Potassium Sorbate...Active Ingredients: Thyme Oil 0.01%, Cedar Oil 0.05%, Lemongrass Oil 0.05%...
Health FeaturePest ControlPest ControlPest ControlPest ControlPest Control

Questions & Answers

4 Customer Questions

Is the gallon a concentrate? If so, what is the mix ratio?
Answer by ChewyJun 18, 2022
The gallon is not a concentrate, it is a larger ready-to-use formula, it can be used as a refill for the spray bottle.

Is this safe for cows and calves?
Answer by ChewyJul 15, 2019
This product is not recommended for cows.

Can this be used on dogs?
Answer by ChewyFeb 27, 2021
This repellent spray is not designed for dogs, only horses.

Does it work on yellow flies?
Answer by ChewyJun 06, 2020
The spray does work on horse flies, house flies, stable flies, face flies, horn flies, deer flies, gnats, mosquitoes, lice, ticks, and deer ticks that may transmit Lyme Disease.

ReviewsWrite a Review

Rated 4.7222 out of 5 stars
18 Ratings
Would recommend to a friend

18 Customer Reviews

Rated 5 out of 5 stars
By Lindy on Aug 7, 2023

Best Fly Spray

August is the worse month for flies at the barn. We have multiple types of fly spray from concentrate to full force. Within a few minutes, mosts sprays used will stop working. Endure has proven to be above all the rest. I am beyond thrilled with how it works for my horse.

Rated 5 out of 5 stars
By Sherry on Aug 31, 2023

Consistently effective

I have used this product repeatedly for several years. It is always effective.

Rated 4 out of 5 stars
By Ponytogo on May 25, 2022


It stays on a few days and great on trail rides to keep the fly's off. Nothing can completely keep the fly's away sadly!

Rated 5 out of 5 stars
By Kelly on Aug 25, 2022

Good stuff

Works better than other fly repellants we've used.

Rated 5 out of 5 stars
By FlySpray on Feb 7, 2022

Great product

This is a really good product. Under normal conditions it lasts at least a day, and in winter, for mosquitoes and such, a couple of days. My horses who are more sensitive to some products handle this one fine. Pricing is good, too! Regarding packaging, it would help if tape was placed around the cap. The product leaked in the box. The box itself had a lot of packing material in it but being a liquid, the product leaked. No one likes to lose expensive product... Thanks!

Rated 5 out of 5 stars
By Best on Sep 10, 2021

The only repellent!

The best out there! Very little smell and nothing like all the others. I have 1 horse that HATES the smell of most sprays and won't allow me to use other sprays on him but had no problem with this. I have another horse with SEVERE allergies to most Flys and bugs and this spray has completely changed her quality of life.

Rated 4 out of 5 stars
By Muckboot on Aug 25, 2021

This Year's Winner

Every year I end up using a different fly spray, whichever one seems to be working the best. Endure is working the best this year. It has a great smell to it. But, as EVERY horse owner knows, the statement on the label of this product and other brands as well, that it protects for 14 days is a total joke.

Rated 5 out of 5 stars
By Steph on Aug 27, 2021

My go to fly spray

Been using Endure for years and it is very effective repelling flies. I keep a bottle in my tackroom and in my trailer.

Rated 5 out of 5 stars
By Llou on Aug 27, 2021

Works fast, lasts long

I’ve used this for many years. Never disappoints, my horse even lets me spray his face.

Rated 4 out of 5 stars
By SleepyD on Mar 14, 2021

Farnam Endure Fly Spray

This spray works better than any other sprays I've used in the past and I've used just about every brand out there natural and chemical. It doesn't seem to be sweat resistant or last as long as it says it does. I still have to apply 2x a day during fly season. So 4 stars for being good but not quite as advertised.