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Correct application of blowfly products is essential


Applying CLiK EXTRA™, CLiK™ or CLiKZiN™ products:

The Elanco CLiK™ portfolio, made up of CLiK™EXTRA, CLiK™, and CLiKZiN™, are Insect Growth Regulators (IGRs): they work by preventing the harmless first stage blowfly larvae developing into the damaging second and third stage maggots responsible for flystrike. These are the only products to benefit from FleeceBind™, a technology that allows the product to spread and bind to give full fleece protection*, minimising the risk of blowfly strike.

When applying CLiK EXTRA™, CLiK™ or CLiKZiN™, it is recommended to:

  • use either a CLiK™ or CLiKZiN™ applicator gun
  • calibrate the applicator gun before use
  • hold the gun approximately 45cm from the sheep during application
  • apply to a clean fleece
  • apply the total required dose one quarter at a time, using the 4-stroke method (see diagram),
    1. mid-shoulder to middle of back
    2. middle of back to top of tail
    3. one side of tail to crutch
    4. other side of tail to crutch
  • take care to overlap each stroke to allow the Fleecebind™ formulation to spread evenly over the fleece and bind to give full fleece protection. This ensures an accurate spread of the product.

Be sure to prevent animals from rubbing and removing the product until the product has bound into the fleece, to avoid reduction in the duration of protection.


CLiK Portfolio Product Application:



Applying Crovect™:

Crovect™ is a Synthetic Pyrethroid (SP) that kills adult blowflies and larvae. It also provides treatment and control of ticks, biting lice and headflies. When applying Crovect, it is important to use the Crovect™ applicator and the correct nozzle for the ectoparasite you are treating and always calibrate before use. The applicator includes:

  • fan spray nozzle for blowfly prevention
  • t-bar nozzle for treatment of blowfly strike and for treating headflies
  • pin-strip (straight) nozzle for lice and ticks – part the fleece and apply to the skin

Blowfly prevention

Apply as a fan-spray to the surface of the fleece on the back and hindquarters of the sheep using the Pour-On Gun fitted with the fan-spray nozzle.

Blowfly prevention

Blowfly treatment

Apply directly using the T-bar nozzle only to the areas affected by strike. Ensure that all affected parts are treated.

Blowfly treatment

Lice control

Using the straight nozzle on the Pour-on gun, apply as a pin-stream from the shoulders to the rump along the middle of the backline.

Lice control

Headfly control

Apply to the top of the head between the ears using the T-bar nozzle. Take care not to apply product in the sheep’s eyes.

Headfly control

Tick control

Using the straight nozzle on the Pour-on gun, apply as a pin-stream from the crown of the head to the top of the rump.

Tick control

Click here to find out about how to apply the CLiK® range of products

Calibration of CLiK Applicator

CLiK family application video

CLiK™ EXTRA 65 mg/ml Pour-On Suspension for sheep contains dicyclanil and is indicated for the prevention of blowfly strike on sheep caused by Lucilia sericata or Wohlfahrtia magnifica. CLiK™ Pour-On for sheep contains 5% (w/v) dicyclanil and is indicated for the prevention of blowfly strike due to Lucilia sericata or Wohlfahrtia magnifica on sheep CLiKZiN™ Pour-On Suspension for Sheep contains the active ingredient dicyclanil and is indicated for the prevention of blowfly strike on sheep due to Lucilia sericata. Crovect™ Pour-On for sheep contains 1.25% (w/v) cypermethrin (cis:trans/80:20). For the treatment and control of headflies, tick infestation with a persistent efficacy of 10 weeks (the majority of ticks killed within 3 hours) and treatment of biting lice in sheep. Also for the prevention and treatment of blowfly strike in sheep. Legal category for all: POM-VPS Information regarding the side effects, precautions, warnings and contra-indications can be found in product packaging and leaflets; further information can also be found in the Summary of Product Characteristics. *Spreads to areas covered by fleece, other areas may not be protected, including the feet CLiK™ EXTRA, CLiK™, CLiKZiN™, Crovect™, FleeceBind™, Elanco™ and the diagonal bar™ logo are trademarks of Elanco or its affiliates. Use medicines responsibly (www.noah.co.uk/responsible). Advice should be sought from the prescriber prior to use. PM-UK-21-0351