Karlsten Spider Killer Spray 400 ml, Indoor Aerosol

Karlsten Spider Killer Spray is a ready-to-use aerosol listed for direct treatment of visible spiders and webs indoors. The page claims contact action and names two active ingredients, but its title gives 400 ml while the model code ends in 300, so confirm the can size before ordering.

At a glance

Ready-to-use spray described for direct application to visible spiders and webs.
The listing names indoor use in rooms, bedrooms, hallways, lofts and cupboards, including corners, window frames and skirting boards.
Contains listed Tetramethrin 0.24% w/w and Permethrin 0.25% w/w.

Price

£11.04Save 15%

Reference price: ~~£12.99~~

Price checked: 12 Nov 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

Karlsten Spider Killer Spray & Repellent 500ml | Indoor & Outdoor Use | Kills & Repels Spiders Lasts Up to 6 Weeks Indoor & Outdoor Use 500ml Ready-to-Use Spray HSE Registered Product 10668

£11.86

Nikura Peppermint Essential Oil - 10ml | Perfect for Repelling Spiders, Rats, Mice, Bugs, Ants | Great for Hair, Headaches Relief, Energy Boost, Skin, Candle Making | Vegan & UK Made

£4.99

Pros and cons

Pros

Targeted aerosol application is intended for visible spiders and webs in corners and other hard-to-reach indoor spots.
The listing gives specific indoor locations and an ingredient breakdown, helping buyers assess whether the stated use suits their needs.

Technical specifications

8 specifications

Identity
Brand	E&G Products Limited
Item model number	Karlsten-spider-300

Formulation and use
Listed volume	400ml
Form	aerosol
Tetramethrin	0.24% w/w
Permethrin	0.25% w/w
Listed registration reference	HSE GB 10517

Dimensions and installation
Dimensions listed	20 x 8 x 20 cm; 350 g

What to know before buying

Listing details to confirm

Listing details are inconsistent: the title and feature text specify 400ml, but the model number ends in 300. The dimensions and weight are listed together without clarifying whether they describe the product or packaging. Although the listing primarily describes indoor use, one feature also mentions CCTV cameras and outdoor equipment. Confirm the selected can size, intended use and label directions before use.

Who is it for?

A good fit for

People seeking a ready-to-use aerosol for visible spiders and webs in indoor areas.
Buyers who want a spray listing its named active ingredients and indoor application locations.

Less suited to

Buyers who need a clearly confirmed can volume or an explicitly consistent product identifier.
Anyone looking for evidence of residual protection or a long-term repellent effect, which the supplied listing does not establish.

Karlsten Spider Killer Spray 400 ml, Indoor Aerosol · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 28 ratings

5 stars69%69%
4 stars31%31%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied aggregate ratings lean positive, with ratings confined to four and five stars in the displayed distribution. This is a small rating sample and gives no reasons for customer opinions, so it cannot establish how well the spray performs or resolve the listing's conflicting volume details.

Frequently asked questions

What is the stated can size?

The title and feature text state 400ml, while the model number ends in 300. The listing does not resolve this discrepancy, so confirm the selected can size before buying.

Where does the listing say it can be used?

It describes indoor use in rooms, bedrooms, hallways, lofts and cupboards, and application to visible spiders and webs around corners, window frames and skirting boards. Another feature mentions CCTV cameras and outdoor equipment, so check the product label for the intended application.

Which active ingredients are listed?

The listing names Tetramethrin 0.24% w/w and Permethrin 0.25% w/w.

How should it be applied?

The listing describes direct application to visible spiders and webs and says to follow label directions.