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🛡️ Defend your domain with Karlsten – where fast meets lasting!
Karlsten Ant Killer Spray 5L features an extra-strong cypermethrin formula engineered for rapid elimination of red and black ants. Suitable for both indoor and outdoor use, it forms a long-lasting protective barrier that prevents future infestations. The large 5-litre container offers cost-effective, extensive coverage, making it ideal for managing ant problems across large areas. Manufactured in the UK, this spray combines proven pest control efficacy with trusted quality standards.









| ASIN | B093C1B2DP |
| Active Ingredients | cypermethrin |
| Active ingredients | cypermethrin |
| Best Sellers Rank | 4,036 in Garden ( See Top 100 in Garden ) 47 in Ant Control |
| Brand | Karlsten |
| Brand Name | Karlsten |
| Country of Origin | United Kingdom |
| Customer Reviews | 4.3 out of 5 stars 377 Reviews |
| Included Components | Ant killer |
| Item Form | Spray |
| Item form | Spray |
| Liquid Volume | 5 Litres |
| Liquid volume | 5 Litres |
| Manufacturer | Lodi Uk Limited |
| Specification Met | HSE 10668 |
| Specification met | HSE 10668 |
| Target Species | Ants & Red Ants |
| Target species | Ants & Red Ants |
| Unit Count | 5000.0 millilitre |
P**A
Excellent ant killer!
This stuff is absolutely amazing! I use it once a year on the affected area of my patio and literally have no ants at all through the whole summer! An absolute must if you have ants! Literally works immediately! Get yourself a spray bottle though, wear gloves and protective glasses when you use it! Pour it in your spray bottle and go! Very easy to use! Be careful if you have pets though!
K**R
Seems fairly effective but expensive.
Seems fairly effective and after soaking the lower bricks of our walls twice, we've not had any more ants indoors. We live on sandy soil area which may even be an ant heap in disguise.
P**)
Very pleased with how effective this ant killer spray is.
This is the second time we have bought this ant spray and it seems to keep the ants under control. We spray around the outside of the house with a 5 litre garden pressure sprayer and it keeps the ants at bay. Last year we arrived home from holiday to find an infestation inside the house in the bay window. We had bought a five litre tub of it before we went but not used it. We sprayed the infestation and got rid of them, havingsprayed the carpet inside, pulled up the carpet in the bay window and sprayed the underlay and screeded floor. Ever since, we have sprayed around the house, particularly the bay window and had no re-infection and it seems to keep them under control. This is the third 5 litre tub we have bought of this and have been very pleased with the results
M**R
Dealt effectively with the super colony in our lawn
We let nature take over our garden last year and ended up with a super colony of red ants in our lawn that made it impossible to mow in the autumn and nearly caused the gardener to quit. This year I’ve been treating the ant hills as I see them. I pour into the large nests (some over 30cms in diameter) and spray the smaller ones. All seem to be gone now so very happy. I bought two bottles of this and just started the second after 3 months No real issues with the dispenser spray; had to fiddle about with it initially but fine once it got going. We still have a wild meadow area across the drive from the main garden for ants and other bugs and creatures to live in by the way, but we can enjoy the garden too.
S**E
WORKS BUT NOT AS WELL AS CLAIMED
Used this on visible ant infestations and certainly did not kill instantly. Watched ants swimming in it then crawling away. Looks like may harm grass, but as it so dry it is difficult to blame this conclusively. Definitely looks browner in area where spray concentrated though. Probably say it has reduced the infestations, but has not eliminated them by any means as still plenty of the little blighters running around. We seem to be plagued with a huge number of nests, so maybe we are beginning to tackle the problem. Have used all 5 litres but not sure I will re-order, maybe try something else.
J**N
Work well
Works well on initial application kills everything straight away. Don't know if it kills the nest or how long the effect will last only time will tell but it's sorted my initial problem out. I use a battery sprayer that you can buy on Amazon just drop the filter in the container and away you go makes it easy to apply. Seems to be very effective on all kinds of bugs as well as ants.
P**L
It's good
It's good
M**T
Karlsten Ant killer
I bought this item to get rid of ants in my garden. I only started using it two days ago when you spray the ants they die straight away which is brilliant. so far I haven't seen anymore but it is early days but it is killing them once sprayed. I bought the two containers with the free sprayer the only thing was on the sprayer there was a back cap which did not fit the container so what I did was to drill a hole in the cap I took off the container and fed the tube through and was able to screw it on to hold it in place. I have used many things to try to get rid of the ants I have more confidence this one is the best I have used.
Trustpilot
2 weeks ago
2 weeks ago