Mostyn Duo CS - 500ml

Sale price£109.99

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In stock (49 units), ready to be shipped


Mostyn Duo offers quick and long lasting control against a wide range of flying and crawling insects. A highly specialised combination of microencapsulation and emulsion-in-water technology, the active ingredients offer dual control. When sprayed, prallethrin (EW) delivers a fast knockdown and flushing effect, while the microencapsulated cyphenothrin gives long lasting residual control. As well as being ideal for use in a variety of environments, Mostyn Duo can also be used against ants and wasps via targeted spraying application.

This product is made here in the UK. With the rising costs of importing products, it has never been a better time to buy British. Buying UK made product not only means you are helping to reduce our carbon footprint, but you are also supporting UK manufacturers. We’re proud to be a UK manufacturer and supporter of UK trade, and pride ourselves on manufacturing and sourcing the highest quality UK made products wherever possible.

Application Environments

- Domestic/commercial/ industrial/agricultural premises
- Hotels/hospitals/shops/ municipal buildings
- Restaurants/food handling areas
- Dairies/livestock and poultry houses/stables/farm buildings
- Buses/trains/aircraft and other transport
- Refuse tips/refuse storage areas
- Raw material stores, grain mills, empty granaries, other storage areas

Target Pests: Ants (adults and nymphs), Beetles, Bed bugs (adults and nymphs), Cockroaches (adults and nymphs), Darkling beetles (adults and nymphs), Earwigs, Fleas, Flies, Hornets and Asian hornets, Moths, Red mites (adults and nymphs), Silverfish, Wasps

Mode of Action: Cyphenothrin and prallethrin disrupt the nervous system of the target pest via stomach and contact action, causing rapid knockdown and death.

HSE No. 10383

  • Broad spectrum insect control
  • Enhanced operator safety
  • Low mammalian toxicity
  • Microencapsulation – ensuring controlled release
  • Emulsion in water - gives fast knockdown
  • Improved efficacy and longevity in dusty and dirty environments
  • Flushing effect

Cyphenothrin 10.7% w/w and prallethrin 1.1% w/w

Application Concentration / Application Rate:
Surface, Spot, Barrier, Perimeter, Crack and Crevice application:

Applications Mostyn Duo CS Water* Surface
Low infestation or application on clean surfaces 75 ML 5 L 100 m² (50ml/m²)
High infestation or application on dirty and/ or highly absorbent surfaces and on floors 100 ML 5 L 100 m² (50ml/m²)
Targeted ant, wasp and hornet nest applications 1ml 50ml 1 m²


Indoor space treatment – cold and hot fogging: 

Application  Mostyn Duo CS Water* Volume
Cold Fogging 100ml 5L 500 m³
Hot Fogging 100ml   500 m³




This product can only be used by people who are required to use pesticides as part of their work and who have received appropriate information, instruction and training.

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