---
product_id: 53276519
title: "Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use"
brand: "pest expert"
price: "C$4785"
currency: NIO
in_stock: true
reviews_count: 8
category: "Pest Expert"
url: https://www.desertcart.ni/products/53276519-pest-expert-cluster-fly-killer-spray-treatment-1ltr-formula-c
store_origin: NI
region: Nicaragua
---

# Fast-acting knockdown Water-based & low-odour 12-week residual protection Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use

**Brand:** pest expert
**Price:** C$4785
**Availability:** ✅ In Stock

## Summary

> 🦟 Zap flies fast, stay fly-free longer!

## Quick Answers

- **What is this?** Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use by pest expert
- **How much does it cost?** C$4785 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/53276519-pest-expert-cluster-fly-killer-spray-treatment-1ltr-formula-c)

## Best For

- pest expert enthusiasts

## Why This Product

- Trusted pest expert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Safe & Clean Use:** Water-based, non-staining formula with low odour for indoor peace of mind
- • **Lifecycle Disruptor:** Insect Growth Regulator stops new flies before they hatch
- • **Long-Lasting Shield:** Protects treated areas for up to 12 weeks with residual effect
- • **Triple-Action Power:** Three potent actives for unbeatable cluster fly eradication
- • **Max Coverage Efficiency:** Covers 50m² per application—cost-effective and thorough

## Overview

Pest Expert Formula 'C+' Cluster Fly Killer Spray is a professional-strength, fast-acting, and long-lasting solution featuring a triple-active formula including an insect growth regulator. It delivers rapid knockdown and up to 12 weeks of residual protection, while being water-based and low-odour for safe indoor use. Covering 50 square meters per application, it’s the ultimate choice for effective cluster fly control in homes and businesses.

## Description

Pest Expert Formula 'C+' Cluster Fly Spray is a fast-acting cluster fly killer with a long-lasting residual that helps maintain cluster fly control. Our latest innovative formulation incorporates two additional active ingredients. The first is pyriproxyfen, a ground-breaking insect growth regulator that halts the progression of the lifecycle development from juvenile to adult, resulting in the inability for the fly to reproduce. The second is the addition of chrysanthemum cinerariaefolium extract, a natural pyrethrum, which when combined with cypermethrin (0.1%) has a synergistic effect, helping to deliver an even faster knockdown and longer-lasting residual for ongoing control of all lifecycle stages. Pest Expert Formula 'C+' is the most powerful cluster fly killer spray available to the amateur market, offering both fast-acting and long-lasting cluster fly control to help you eradicate a cluster fly infestation in your home, loft or roof space. Formula 'C+' Cluster Fly Spray should be applied to any alighting surfaces including window frames and roof timbers. Formula 'C+' is water-based and low-odour, making it 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).

Review: Does the job very well - I rarely write reviews, but for this product I had to. I was having serious problems with fruit flies in my restaurant. I used three cans of Raid at once and they didn’t die, but with this product they all died within minutes. Amazing — highly recommended.
Review: Works very well - Superb product

## Features

- Use biocides safely. Always read the label and product information before use.
- Very toxic to aquatic life with long lasting effects.
- Very toxic to aquatic life.
- ✅ THE STRONGEST CLUSTER FLY SPRAY ON THE MARKET – Our latest innovative formulation contains three powerful active ingredients making it unparalleled in its ability to eradicate cluster fly infestations from the home or business.
- ✅ NEWLY DEVELOPED FORMULATION – Now containing three powerful active ingredients, including an Insect Growth Regulator, Formula C+ kills cluster flies on contact and halts the progression of the cluster fly lifecycle development, resulting in no new numbers.
- ✅ FAST ACTING AND LONG LASTING – The three potent active ingredients work in a synergistic way helping to deliver an even faster and more widespread knockdown of cluster fly and leaves an insecticidal residue that continues to protect for up to 12 weeks.
- ✅ NON-STAINING AND LOW-ODOUR – Formula C+ is a ready-to-use, water-based spray so can be applied directly to any surface and furniture without causing any damage or nasty lingering smells.
- ✅ INCREASED COVERAGE – Formula C+ now covers 50 square meters in a single application making it the most cost-effective cluster fly spray on the market.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B010E2GZGQ |
| Best Sellers Rank | 9,619 in Garden ( See Top 100 in Garden ) 101 in Fly Control |
| Customer Reviews | 4.4 4.4 out of 5 stars (387) |
| Date First Available | 25 Jun. 2015 |
| Item volume | 1000 Millilitres |
| Manufacturer | Pest Expert |
| Manufacturer reference | SB |
| Package Dimensions | 31.3 x 15.7 x 6 cm; 1.1 kg |
| Part number | SB |

## Product Details

- **Brand:** Pest Expert
- **Item form:** Spray
- **Liquid volume:** 1000 Millilitres
- **Specification met:** USDA
- **Target species:** Insect,Flies

## Images

![Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use - Image 1](https://m.media-amazon.com/images/I/318LmSXXXkL.jpg)
![Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use - Image 2](https://m.media-amazon.com/images/I/31h1fKoxP0S.jpg)
![Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use - Image 3](https://m.media-amazon.com/images/I/61yB+yAIchS.jpg)
![Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use - Image 4](https://m.media-amazon.com/images/I/71FXOmXlBrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does the job very well
*by L***A on 4 January 2026*

I rarely write reviews, but for this product I had to. I was having serious problems with fruit flies in my restaurant. I used three cans of Raid at once and they didn’t die, but with this product they all died within minutes. Amazing — highly recommended.

### ⭐⭐⭐⭐⭐ Works very well
*by A***N on 19 October 2025*

Superb product

### ⭐⭐⭐⭐ Good product
*by J***L on 16 March 2021*

Very good 👍👏

## Frequently Bought Together

- Pest Expert Cluster Fly Killer Spray Treatment 1Ltr - Formula 'C+' Advanced Maximum Strength Fly Spray, Fast-Acting & Long-Lasting Control, Professional Strength Approved for Amateur Use
- Pest Expert Cluster Fly Killer Smoke Bombs 4 x 3.5g - Formula 'P' Fumer Cluster Fly Bomb (HSE approved and tested – professional strength product)
- Pest Expert Formula ‘P+’ Cluster Fly Killer Fogger Treatment 4 x 150ml – Maximum Strength Fly Bombs for Fast-Acting Effective Control, Professional Strength for Approved Amateur Use

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-09*