Does it do any damage to plants or flowers in the room you spray?

I don’t think it’s intended to spray a room as such - as with say a fly spray. I believe it’s meant for use by spraying directly to the crawling insects - which gives you a problem if you happen to be afraid of spiders!

Does this work foe silver fish? As a long term solution

Hi. I haven't used the Karlsten on silverfish as I always reach for Rug Remedy UK's Silverfish Killer - they don't move a millimetre after being sprayed directly with this and it seems to incapacitate or kill them if you spray the area - and it dries quickly and works well on all surfaces you want to spray. I also spray the floor across doorways and all round the doorframe as they can climb walls and they do cross both hard floors and carpets. Rug Remedy's Silverfish Killer contains Cypermethrin whereas Karlsten contains Permethrin and Tetramethrin. Rug Remedy's instructions are to re-apply every 3 months or sooner if required. If you decide to buy Rug Remedy's Silverfish Killer, I'd recommend the one with the curved trigger top; the more angular one seemed to leak through somehow and I'd end up with a wet hand while I was spraying. I buy the 1 litre size.

Yes it kills flies and all other crawling/ flying insects.

Can anyone tell me if this product has the ingredients Piperonyl Butoxide??

Does not state this ingredient on the tin - have used this spray and it is not very effective

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Description

⚡ Defend your space fast — because pests don’t wait!

POWERFUL COVERAGE - 10-second spray treats 1 square meter efficiently
VERSATILE APPLICATION - Effective indoors and outdoors for total home protection
SATISFACTION GUARANTEED - Backed by Karlsten’s quality assurance & 24/7 support
TRUSTED SAFETY STANDARD - HSE registered formula ensures safe use in UK homes
RAPID INSECT ERADICATION - Kills spiders, fleas, wasps & more in seconds

Multi Insect Killer X 2 Aerosols (300ml each) delivers a potent, fast-acting solution to eliminate a wide range of common household insects including spiders, fleas, wasps, and hornets. Designed for both indoor and outdoor use, this HSE registered aerosol from trusted UK brand Karlsten offers efficient coverage with just a 10-second burst treating 1 square meter. Ideal for busy professionals seeking reliable, hassle-free pest control with guaranteed satisfaction and expert customer support.

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