1 / 7Karlsten Spider Killer Spray 500ml, Model 2012
Model: Karlsten Spider Killer Spray is a 500ml cypermethrin formula listed for indoor and outdoor use. The listing claims contact action and residual protection for up to six weeks, while customer feedback reports mixed effectiveness and spray performance.
At a glance
- Listed for indoor and outdoor use, including floors, walls, corners and cracks.
- The listing claims contact killing and residual protection for up to six weeks after spraying.
- The listed active ingredient is cypermethrin.
Reference price: £13.95
Price checked: 12 Nov 2026
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Pros and cons
Pros
- The 500ml spray is presented for use in both indoor and outdoor areas.
- Residual protection of up to six weeks is claimed, reducing the need for frequent reapplication if that claim applies in use.
Cons
- Customer feedback reports that the spray mechanism can fail or require repeated use.
- Feedback on effectiveness is mixed, and some customers describe poor value for money.
Technical specifications
8 specifications| Brand | Karlsten |
|---|---|
| Model | 2012 |
| Form | Spray |
|---|---|
| Target species | spiders |
| Liquid volume | 500.0 |
| Active ingredient | cypermethrin |
| Specification listed | HSE 10668 |
| Weight listed | 0.02 Kilograms |
|---|
What to know before buying
- The up-to-six-week residual period and contact-action performance are listing claims, not independently established results. Follow product label directions when applying the cypermethrin spray.
Who is it for?
A good fit for
- Buyers looking for a spider-targeted spray for indoor and outdoor application.
- People who want a ready-to-spray format for treating areas such as corners, cracks, floors and walls.
Less suited to
- Buyers who need consistently reliable spray delivery based on the reported feedback.
- Anyone requiring a product with customer feedback that consistently confirms spider-killing effectiveness.
Customer reviews on Amazon
- 5 stars
57% 57% - 4 stars
19% 19% - 3 stars
11% 11% - 2 stars
4% 4% - 1 star
9% 9%
Customer feedback highlights reported odourlessness and perceived effectiveness, but experiences with spider killing vary. Some customers report successful results while others say it did not work. Spray delivery also draws criticism, including reports of mechanism failure or repeated application, and value for money is viewed negatively by some. For buyers relying on coverage across indoor or outdoor areas, inconsistent delivery matters because it may affect how easily the listed application areas can be treated. The product listing claims contact action and protection lasting up to six weeks, but those claims do not resolve the differing customer experiences.
Positive themes
- Some customers appreciate that the spray has no noticeable odour.
- Some customers report effective spider control.
Negative themes
- Some customers report that the spray mechanism fails or requires repeated use.
- Some customers describe the product as poor value for money.
Mixed feedback
- Customers disagree about effectiveness, with some reporting successful spider control and others saying it did not work.
Frequently asked questions
How much spray is listed?
The listed liquid volume is 500.0.
Can it be used indoors and outdoors?
The product title and features list indoor and outdoor use. The listing names floors, walls, corners and cracks as application areas.
How long does the protection last?
The listing claims residual protection for up to six weeks after spraying. This is a product claim, not an independently verified duration.
What do customers report about its performance?
Customer feedback is mixed on spider-killing effectiveness and includes reports of spray mechanism problems or needing repeated use.
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