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For orders over £50 placed before 4.00pm
Pest Expert Formula C+ Advanced Cluster Fly Killer Spray is the new and improved formulation of our bestselling original product, Formula C. Formula C+ Advanced is a ready-to-use triple action cluster fly killer, with a long-lasting residual that maintains cluster fly control for up to 12 weeks. Its unique combination of actives make it the most powerful cluster fly spray available to the amateur market, and the ultimate insecticide for anyone wanting fast and effective eradication of any size cluster fly infestation
• Fast-acting: Rapid knockdown Product Information
• Low-odour: No smell during or after use
• Non-staining: Will not damage household furnishings
• Long-lasting: Residual maintains cluster fly control for up to 12 weeks
• Increased coverage: 1L now treats up to 50m2 in a single application
As market leaders, our latest innovative formulation now incorporates two additional active ingredients. The first is pyriproxyfen, a ground-breaking insect growth regulator that cleverly works by halting the progression of the cluster flies lifecycle development from juvenile to adult, resulting in an inability for the fly to reproduce, and therefore ensuring there is no increase in numbers.
The second is the addition of chrysanthemum cinerariaefolium extract, a natural pyrethrum, which when combined with the existing concentration of cypermethrin has a synergistic effect, helping to deliver an even faster knockdown and longer-lasting residual for ongoing control of all life-cycle stages.
With approval for both professional and amateur use, this professional-grade product can also be used safely in the home. Formula C+ Advanced is easy to use and can be applied directly to window frames and exposed beams as it is water-based and non-staining, so will not cause any damage.
Being low odour and free from solvents, Formula C+ Advanced is perfectly suitable for use in homes with children and/or pets, provided they are kept out of the area being treated until all surfaces are dry (2-3 hours).
Formula C+ Advanced now offers an increased coverage of up to 50 sq m per litre.
One application should be enough for a successful cluster fly treatment. However, to eradicate a particularly heavy carpet beetle infestation then a second application may be required.
As a broad spectrum insecticide, Formula C+ Advanced is also highly effective against a wide range of flying and crawling insects including bed bugs, cockroaches and fleas.
Directions for use
Lightly spray roof timbers, sash windows, Velux windows, window frames and any other alighting surfaces or cluster fly harbourages. Try to avoid cleaning these surfaces as this will remove the protective residue.
Recommendations
Best used following treatment with a fumigation device such as a Pest Expert Formula 'P' Fogger or Smoke Bomb to flush out the initial cluster fly infestation. We highly recommend our Cluster Fly Control Kits as they contain a combination of our best cluster fly killer products including Pest Expert Formula 'C' Cluster Fly Spray, Formula 'P' Foggers or Smoke Bombs and Pest Expert Formula 'P' Powder and offer better value for money than purchasing these items individually.
Write an online review and share your thoughts with other shoppers!
Reviewer: Sarah from Lancashire
Very helpful advice when I asked & quick delivery. This stuff is absolutely knock out. We had the misfortune of getting maggots in our back garden that despite throwing all we had at them 2 x expensive spray off amazon & the copious amounts of salt later just kept appearing. Turns out the adjoining neighbour had them but was leaving them to ‘fly away’. We’ve used this and the powder and it’s working. The sight of any isn’t a complete melt down moment for me anymore. I sprayed a little around the pvc on the back door which we leave open a lot with a chain curtain on but still get flies creeping in and I went outside a few hours later to a step with about 10 dead flies, some dead wood lice & a few dizzy looking ants. Just be careful around helpful bugs & bees. I recommend to anyone. I’ll be making sure we always have this.
Very helpful advice when I asked & quick delivery. This stuff is absolutely knock out. We had the misfortune of getting maggots in our back garden that despite throwing all we had at them 2 x expensive spray off amazon & the copious amounts of salt later just kept appearing. Turns out the adjoining neighbour had them but was leaving them to ‘fly away’. We’ve used this and the powder and it’s working. The sight of any isn’t a complete melt down moment for me anymore. I sprayed a little around the pvc on the back door which we leave open a lot with a chain curtain on but still get flies creeping in and I went outside a few hours later to a step with about 10 dead flies, some dead wood lice & a few dizzy looking ants. Just be careful around helpful bugs & bees. I recommend to anyone. I’ll be making sure we always have this.
Quick delivery and the spray seemed to do the trick. All in all, very pleased.
Very good service. Spray arrived the next day and cluster flies disappeared. Couldn't ask for more!
Excellent service impressive delivery. The product was easy to use and contained full instructions - certainly killed the flies in my loft. Would definitely recommend this company and would use again if needed.
brilliant service... brilliant product, cluster flies eradicated.
I needed to get rid of flies in the loft and after reading positive reviews I ordered the Formula C, I ordered one afternoon and they arrived the next morning, fantastic delivery. The instructions were clear and product very effective. Excellent service.
Really happy with my purchase! Less flies and a very competitive price!
Great product and great price! Long-lasting residue so should keep the flies away for a while!
Used this spray around the window frames and eaves and have noticed a huge decline in flies around the property - an A1 product!
Great service, quick delivery.
Would shop with the company again. Products were easy to select from the on-line store, purchase and delivery details were easy to complete and the products arrived quickly and in good order. Would repeat purchase from the store again
Good service good product
Totally satisfied with price and service
Flies. what flies
I have used this product and it works very good,
Troubled with cluster flies then this product is the answer
We have had the problem of flies getting into the bedrooms through the velux windows for years. The beginning of this year seemed to reach a peek. Desperate I searched the internet and then found this company and read through the product range. This is how I found out that we had a 'cluster fly' problem. Once I had the product I coated the window frames and surrounding roof tiles according to the instructions. I could not believe the results. NO FLIES. I kept opening the velux to check. 5 months and still no flies. Brilliant
Excellent
Excellent service for a very effective product.
Excellent service, good products.
Next-day delivery of good practical products.
All the product and treatment information found within our website has been checked and approved by our own technical team, so you can be assured of both professional guidance and specialist products.
