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Pest Expert Formula C Carpet Beetle Spray 5L

£34.95 incl. VAT
£29.13 excl. VAT

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The Pest Expert Formula ‘C’ Carpet Beetle Spray is the most powerful insecticide on the amateur market for carpet beetles. It is our best-selling product for treating carpet beetle infestations, it is a potent and fast-acting killer that allows a thorough carpet beetle treatment to carpets and rugs. It maintains long-term protection against carpet beetles for carpets as the residue remains effective for up to 12 weeks.

  • Fast-acting
  • Low-odour
  • Will not damage carpets
  • Long-lasting residual maintains beetle control for up to 12 weeks!
  • 5L container treats up to 125m² in a single application

Pest Expert Carpet Beetle Spray Product Information

Pest Expert Formula ‘C’ is a carpet beetle spray that provides rapid and long-term protection against carpet beetles. It provides a quick knockdown of carpet beetles whilst also leaving a residue which remains in place for up to 12 weeks, continuously killing the beetles. Formula ‘C’ Carpet Beetle Spray can be applied directly to rugs and carpets and will not cause any damage as it is water-based.

Formula ‘C’ does not contain solvents and is low-odour, this means it is perfectly suitable for use in homes with pets and/or children, provided they are kept out of the area until the treated surfaces have dried (this normally takes 2-3 hours).

Cypermethrin (0.1% w/w) is the active ingredient of the Formula ‘C’, which is a powerful broad-spectrum insecticide and is highly effective against flying and crawling insects.

The 5L container treats up to 125m² and a single application should be sufficient for a successful treatment of carpet beetles. It is important to note, however, that if the infestation has spread or is quite large, it may need another application for complete eradication.

Directions for use

Apply a fine mist of the Formula ‘C’ onto carpets and/or rugs, spraying more in damaged areas. Carpet beetles tend to favour the darker areas of a room, which means that the eggs and larvae will usually be around the edges of the room, in darker corners and under heavy furniture. As such, we would advise applying plenty of insecticide to these areas. After the application, leave the room for 2-3 hours to give the carpet enough time to dry. Try to avoid cleaning in the treated areas for as long as possible because cleaning in any form will remove the insecticidal residue left by the spray.


In order to achieve an even distribution of the Formula ‘C’ Spray, it is recommended that a Pressure Sprayer is used for an easy and quick application at a professional standard.

For a thorough treatment, it is advisable to apply the Formula ‘P’ Carpet Beetle Powder and fumigate using the Formula ‘P’ Foggers to ensure complete elimination.

To use a combination of products at the best value, please see out Carpet Beetle Treatment Kits, which contain a selection of our best products for treating carpet beetles.

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