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Deosect® Topical Spray for Horses

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  • £43.49 £57.12 Save £13.63 Out of Stock 250ml Bottle
  • £84.98 £132.90 Save £47.92 1 Litre Bottle
SRP £132.90
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Deosect® is a topical spray used to control flies and lice on horses for up to 4 weeks providing long term relief. 

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Product Details

Important: In order to purchase this product you will be required to provide the following information about your animal(s):

(i) The weight of the heaviest animal to be treated

(ii) If the animal is a horse, to confirm if it has or has not been signed out of the food chain

In addition, by accepting our terms and conditions at the point of sale, you are confirming that you have a) used this product before, b) are aware of all relevant and necessary safety precautions, c) will only use the product for its authorised purpose and d) will read all product literature.

Deosect® is an effective topical spray to help control flies and lice on horses, ponies and donkeys.

The Deosect® must be diluted with water just before application. A hand sprayer or sponge can be used to carefully apply the solution avoiding contact with their eyes and broken skin.

For fly control, the application of Deosect® should commence at the onset of the fly season and be repeated monthly for general fly control and every two weeks for severe head and face fly control.

Apply when lice are observed and repeat as necessary at a minimum interval of 14 days.


Deosect® Topical Spray for Horses is available in the following sizes:
  • 250ml Bottle
  • 1 Litre Bottle


  • Active Ingredient
    Cypermethrin (cis 50: trans 50)

Deosect® must be diluted and mixed with water to make a solution just before use. A knapsack, hand sprayer or a sponge may be used to apply the solution. The solution should be used within 24 hours. Avoid spraying directly into animals eyes.

One litre of Deosect® should be diluted with 50 litres of water. Alternatively, the following may be used:

Deosect® 10ml diluted with 500ml Water

Deosect® 20ml diluted with 1 litre Water

Deosect®100ml diluted with 5 litres Water

Deosect® 200ml diluted with 10 litres Water

A medium fine spray is advisable to avoid fogging of the diluted Deosect® Spray.

Careful attention must be paid to total animal coverage, especially the face, legs, back and hind quarters. The following amounts should be used:

Adult horses:

500ml of diluted solution per animal.


125ml of diluted solution per animal.

Withdrawal Period: Not to be used in animals intended for human consumption.

What our vet says

What our vet says
"This is a long-lasting spray and highly effective. Remember that you must dilute this before use. Always read the instructions carefully before using. A good tip is to keep your horses eyes clean and dry so as not to attract more flies and also keep fly masks spotlessly clean."
John Campbell - Head Veterinary Surgeon (BVM&S BSc MRCVS)
John Campbell Head Veterinary Surgeon And
Co-Founder (BVM&S BSc MRCVS)