--- product_id: 77594398 title: "Karlsten Fly Killer Spray 300ml Aerosol – Insect Killer Spray for Flies, Wasps, Spiders, Ants, Fleas & Silverfish | Fast Acting Indoor & Outdoor Bug Spray" brand: "karlsten" price: "€ 39.64" currency: EUR in_stock: true reviews_count: 8 category: "Karlsten" url: https://www.desertcart.hr/products/77594398-karlsten-fly-killer-spray-300ml-aerosol-insect-killer-spray-flies store_origin: HR region: Croatia --- # Fast-acting formula Indoor & outdoor use Kills flying & crawling insects Karlsten Fly Killer Spray 300ml Aerosol – Insect Killer Spray for Flies, Wasps, Spiders, Ants, Fleas & Silverfish | Fast Acting Indoor & Outdoor Bug Spray **Brand:** karlsten **Price:** € 39.64 **Availability:** ✅ In Stock ## Summary > 🦟 Zap bugs fast, live pest-free—because your space deserves the best! ## Quick Answers - **What is this?** Karlsten Fly Killer Spray 300ml Aerosol – Insect Killer Spray for Flies, Wasps, Spiders, Ants, Fleas & Silverfish | Fast Acting Indoor & Outdoor Bug Spray by karlsten - **How much does it cost?** € 39.64 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/77594398-karlsten-fly-killer-spray-300ml-aerosol-insect-killer-spray-flies) ## Best For - karlsten enthusiasts ## Why This Product - Trusted karlsten brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Action Formula:** See results fast—kills bugs on contact to stop infestations before they start. - • **Compact 300ml Aerosol:** Easy to handle and store, delivering long-lasting coverage with every can. - • **Trusted Safety Standards:** HSE-approved for effective pest control with professional-grade reliability. - • **Eradicate Every Last Pest:** Powerful enough to eliminate flies, wasps, spiders, ants, fleas & silverfish in one spray. - • **Versatile Indoor & Outdoor Protection:** Use confidently anywhere—from kitchens to patios—for all-around pest control. ## Overview Karlsten Fly Killer Spray is a potent 300ml aerosol designed to swiftly eliminate a wide range of flying and crawling insects both indoors and outdoors. Its fast-acting formula targets pests on contact, preventing infestations from escalating. Compact and HSE-approved, this spray offers professional-grade pest control for millennial managers who demand effective, hassle-free solutions to maintain a pristine environment. ## Description Product Description Review: THE Best - Best flying and crawling bug killer ever Review: Works for fruit flies - I was really struggling to get rid of a fruit fly infestation from the summer (thanks to bananas?) eventually they were in every room. I’d get one room fly free and then turn around and they’d be in another room so I needed to do something drastic! These flies get absolutely EVERYWHERE! And all it takes is just 1 fly and the next day you’ll have hundreds more. And those hundreds more lay more and more eggs etc etc. (They can lay up to 500 eggs a day (each)!!) so it’s important to get every single last one in order to solve the problem. Anyway, nothing was working. I tried lots of different methods, sticky paper things that you hang from the ceiling, sticky window/wall stickers, natural home made and store bought ‘traps, and regular fly sprays but AGAIN nothing worked, (regular fly sprays don’t get these types of flies because they are too small for it to take effect). So I tried this spray ONCE in every room of the house and it’s killed them all completely. No flies at all now. Not even 1! It does smell awful, but it definitely works! I’d advise you to close all windows, spray the entire room then shut the door and leave the room otherwise the smell will choke you. It is a sort of citrus zesty smell but mixed with the chemicals, the smell will choke you if you remain in the room for too long. But rest assured it does the job once and for all! I also don’t grudge paying the price of £11 because it does kill them ALL. I read the reviews thinking it’ll probably be a waste of money but it definitely isn’t! And I’ve still got half a can left incase they come back next summer. ## Features - Causes serious eye irritation. - Contains sensitizing substances. May produce an allergic reaction. - Extremely flammable aerosol. - Pressurised container: May burst if heated. - Very toxic to aquatic life with long lasting effects. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Karlsten | | Item form | Spray | | Item weight | 200 Grams | | Liquid volume | 300 Millilitres | | Specification met | HSE | | Target species | Flying & Crawling insects | ## Product Details - **Item form:** Spray - **Item weight:** 200 Grams - **Liquid volume:** 300 Millilitres - **Brand:** Karlsten - **Specification met:** HSE ## Images ![Karlsten Fly Killer Spray 300ml Aerosol – Insect Killer Spray for Flies, Wasps, Spiders, Ants, Fleas & Silverfish | Fast Acting Indoor & Outdoor Bug Spray - Image 1](https://m.media-amazon.com/images/I/61RHOwEkaEL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ THE Best *by T***Y on 18 May 2026* Best flying and crawling bug killer ever ### ⭐⭐⭐⭐⭐ Works for fruit flies *by J***G on 28 January 2022* I was really struggling to get rid of a fruit fly infestation from the summer (thanks to bananas?) eventually they were in every room. I’d get one room fly free and then turn around and they’d be in another room so I needed to do something drastic! These flies get absolutely EVERYWHERE! And all it takes is just 1 fly and the next day you’ll have hundreds more. And those hundreds more lay more and more eggs etc etc. (They can lay up to 500 eggs a day (each)!!) so it’s important to get every single last one in order to solve the problem. Anyway, nothing was working. I tried lots of different methods, sticky paper things that you hang from the ceiling, sticky window/wall stickers, natural home made and store bought ‘traps, and regular fly sprays but AGAIN nothing worked, (regular fly sprays don’t get these types of flies because they are too small for it to take effect). So I tried this spray ONCE in every room of the house and it’s killed them all completely. No flies at all now. Not even 1! It does smell awful, but it definitely works! I’d advise you to close all windows, spray the entire room then shut the door and leave the room otherwise the smell will choke you. It is a sort of citrus zesty smell but mixed with the chemicals, the smell will choke you if you remain in the room for too long. But rest assured it does the job once and for all! I also don’t grudge paying the price of £11 because it does kill them ALL. I read the reviews thinking it’ll probably be a waste of money but it definitely isn’t! And I’ve still got half a can left incase they come back next summer. ### ⭐⭐⭐⭐ It works!! *by C***T on 2 October 2023* It's one of the the few sprays that actually seems to kill the flies! It's not exactly fast working but it does the job. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/77594398-karlsten-fly-killer-spray-300ml-aerosol-insect-killer-spray-flies](https://www.desertcart.hr/products/77594398-karlsten-fly-killer-spray-300ml-aerosol-insect-killer-spray-flies) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-11*