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Deosect Spray

Item Number: DEOSECT

Sale Deosect Spray

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  • 1L

    Estimated dispatch on Wednesday

    Was £85.19 Now £83.59

    Web code: E8880

  • 250ml

    In Stock

    £ 40.99

    Web code: E3600

Total: £0.00

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A straw coloured or pale yellow emulsifiable concentrate, containing 5% w/v cypermethrin (cis 50: trans 50).

A residual insecticide for the control of flies and lice on horses.

Deosect Spray must be diluted with water to make a solution just before use. A knapsack or hand sprayer or a sponge may be used to apply the solution. For the best results the solution should be used within 24 hours.

The product can be safely used during pregnancy and lactation


Dilution rate

One litre (2 pints) of Deosect Spray concentrate should be diluted with 50 litres (11 gallons) of water. Alternatively, the following table may be used:

Deosect                              Water
10 ml                                   500 ml
20 ml                                   1 litre
100 ml                                 5 litres
200 ml                                 10 litres
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. Avoid spraying directly into animals eyes. The following amounts should be used:

Horses – 500 ml of diluted solution per animal.

Ponies – 125 ml of diluted solution per animal.

Fly Control

The application of the solution 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.

Lice Control

Apply when lice are observed and repeat as necessary at a minimum of 14 days.
Contra-indications, warnings, etc

Wear protective gloves, face shield and rubber boots and protective clothing when handling the concentrate and diluted solution and when applying the product. A face shield should be worn when handling the concentrate.


Deosect is a licensed medicine for fly control in horses and has proved safe and effective.

Data Sheets

DEOSECT 1L: Data Sheet

DEOSECT 250ML: Data Sheet


Shipping charges mainland UK zone1

ValueWeightDelivery Charge
Over £49.00Any WeightFREE
Under £49.00No weight limit£4.50
Under £49.00Under 250g£2.99

Most orders are despatched the same day and standard delivery is 3 to 5 working days from despatch. FAST Expedited options are available.

NB: Orders placed with faster delivery must be placed before 13:00 to ensure same day dispatch (excluding weekends and bank holidays). Please also check on the product page that the items ordered show 'In Stock' otherwise your order will be delayed until the stock becomes available, which in most cases will only be 24hrs.

Estimated "Usually shipped in" information is shown against most products

Overseas orders

Postage outside of the UK is from £4.50

Prescription Items

Prescription items will be sent on receipt of a valid signed and dated prescription.

Pick up

We offer a pickup service for orders placed over the phone.

Please ring us on 01833 641112 for more information.

Refrigerated Items

Refrigerated items will be sent by carrier or Royal Mail with coolpacks unless you pay for a premium for a refrigerated delivery. We will contact you prior to despatch for your instructions.


We want you to be completely satisfied with any purchase. If not any item* can be returned to us within 14 days of receipt for exchange or refund Please give us a ring for a returns number on 01833 641112 or alternatively email [email protected] to obtain a returns number.

*Due to legal requirements medicines may not be returned except to correct an error in despatch or in response to an "official recall". If an item is believed to be faulty it should be returned for inspection and it may be necessary to forward it to the manufacturers for testing before replacements or refunds can be authorised. This does not infringe legal rights. Please contact our customer services for a "Returns Number" which must appear on the outside of the package or it will not be accepted. We advise customers to use an insured method of shipping and to retain proof of despatch. We may refuse returns on products specially obtained or manufactured to order. Items must be returned unsoiled and unused and sent adequately packed and carriage paid.

Frequently Asked Questions

Is deosect safe to use on pregnant mares?

This has not been tested on pregnant mares. 

Can you use deosect on foals?

Deosect is licensed for use on adult horses and ponies. There is no specific data regarding use on foals - in this case it should only be used on the advice of your veterinary surgeon. 

can you use deosect on wet horses?

Deosect should be applied to the horse when dry to ensure maximum efficacy.

Does Deosect need to be reapplied every time the horse is washed down or gets wet in rain etc?

Application should be repeated monthly for general fly control and every two weeks for severe head and face fly control. This should not be be applied more frequently than every 2 weeks. 

Can u use on dogs with fleas ?

No this is not for use in dogs. This is licensed for the use on horses only. 

Is this the best in the market? Don’t want to clip my miniature Shetland

Yes this is a licensed medicine for the control of flies and lice on horses

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Easy to use. Goes a long way, which is good as it's not cheap to buy.

Reviewed by: Liz Jupp

Reviewed on: 07 September 2017

Product Variant: DEOSECT 250ML


First time using this product seems to have worked a treat will be using it again come the fly season

Reviewed on: 07 September 2017

Product Variant: DEOSECT 1L


Really good produce, does what it says on the tin

Reviewed by: Alexandra Nixon

Reviewed on: 27 June 2017

Product Variant: DEOSECT 250ML


I did above; it is poor ok very poor

Reviewed by: Victor Breeze

Reviewed on: 24 June 2017

Product Variant: DEOSECT 250ML


excellent value and prompt delivery

Reviewed by: Pat Voisey

Reviewed on: 09 June 2017

Product Variant: DEOSECT 1L

Show More Reviews (50) Show Fewer Reviews (50)

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