Karlsten Spider Killer Spray & Repellent 500ml | Indoor & Outdoor Use

I can’t rate this product highly enough and am so surprised that there are quite a lot or reviews that say it doesn’t work. We have just moved into a house with a major false widow spider issue in the conservatory. There is a batton that runs along the whole width of the room that you can’t get behind and it appeared to be full of false widows. They would come out to eat on their webs but you could never kill one as they’d just disappear behind the batton. I’d wreck the webs thinking they’d move on but they’d just rebuild overnight. I have a major fear of spiders, especially false widows as they bite, so said to my husband we need to tackle this head on and buy a killer spray! This spray had loads of reviews so thought I’d give this a go although did feel it pricy at £13.99 but I was so desperate to get rid of the spiders I bought it. Well, no more false widows anywhere so as far as I’m concerned it has been worth every penny - all the webs were empty of spiders the following day (I kept checking) and before I cleaned the webs away, the webs had bugs in them which clearly weren’t being eaten so proof to me it had worked as I was seeing the spiders move onto the webs daily to eat previously. We then had one really huge false widow elsewhere (I didn’t know they could get so big) and hubbie sprayed that directly - it didn’t die instantly but it forced it out of its hiding place and whilst I could tell it was dying I killed it with a fly swat just to be on the safe side. The spray worked immediately on smaller ones nearby that I didn’t even know were there. The huge added bonus about this spray however is that it’s also killing flies and wasps that happen to fly into the conservatory - we aren’t spraying them - there’s obviously residue spray in the room from spider gate and that’s killing the flying unwelcome guests too so the statement that it works for up to 6 weeks does appear to be true. If we get a butterfly or bumble bee in we are carefully catching that and releasing it as I do suspect it would kill those too which we don’t want. Anyway, couldn’t be happier with this product. It is a shame it is released as a liquid as we do have to wipe up the excess after spraying - an atomised spray (that comes out like furniture polish spray) would be much better in my opinion and easier to spray in a targeted fashion - the liquid comes out with a very wide spread too and sometimes you just want a direct shot on one bug rather than a sweeping cover. It doesn’t have a nasty or lingering smell and I’m reassured by the safety statements on the listing too - I don’t like the idea of spraying nasty chemicals around my son especially when they appear to kills things for weeks after spraying but it says tested as safe for use in homes so I have to rely on that and was a big part of why I felt happy to try it in the first place. If the false widows didn’t give such nasty bites we’d let them be but they do so we don’t and thanks to this product we are false widow free now! We will continue to spray as a preventative measure every 5-6 weeks as the lasting impact of this spray will help keep them out of the house.

Having read a variety of reviews, I wasn't sure how effective this spray would be (if at all). We had a large range of spiders in the garage (which is attached to the house) including a large number of false widows. In the annual clear out of the garage I thought it would be best to de-spider the garage too. I sprayed a reasonable amount onto the roof space and around the door (where there are lots of hiding places) and onto quite a few of the false widows. It didn't kill them instantly and most just backed away into webs. Probably not ideal for indoors and the big ones that run across the floor. Checking the following morning, there were lot's of dead spider bodies on the floor. It appears to good for garages and sheds and under cupboard spaces. Not sure if it will keep them away, but for now it did what I wanted. I'll update the review in a few weeks to see if any have returned.

I have tried many spider repellent and this is the only one I've found to be effective. I can go about 6 weeks between sprays. Keeps spiders away. Product does not have any weird smell and is not offensive for indoor use.

This spray does the job. I’m on my second bottle and like that I can use it indoors and outdoors. If I spray around windows, spiders run off quickly and stay away for months. Bigger spiders don’t die as fast, but it still works overall. Will repurchase again in the future.

This thing is very effective against spiders. My garden was spider-infested and one-two spray at each (cluster of) spider killed them all under a few minutes. The spiders struggled for a couple of seconds and died. Sorry for them but they were overwhelming... The chemicals inside the bottle work well, but not so much for the spray nozzle. The nozzle worked smoothly, to begin with, but died entirely after only a few presses. The liquid just flows out from the nozzle down my arm into my cloth and I had to shower to clear the toxic skin absorbable chemical. I still feel a bit of burn sensation on the contacted area. Hopefully, the dosage is low enough. Apart from this, the nozzle only has a widespread action, which is good for treating a large area, but it is horrible to target the spider nests and individual spiders. I had to swap it for the one from a spider repellent bottle which uses a far better nozzle that also has a concentrated beam action. All in all, I give it 2 stars for ease to use because the chemical is easy to apply but the nozzle is the worst. 3 for stars for value - it is not a particularly cheap product why use such a horrible nozzle? Overall 3 stars, could have been better but not a bad purchase.

Brilliant at keeping spiders away,this is my second bottle I used it twice and on my third time I can’t get any out I have tried cleaning the spray out we have tried everything

This product is brilliant. As someone with a fear of spiders, I found I had to stop going to sit outside as there were suddenly loads of spiders appearing in my yard. I used this to kill the ones out there and it has stopped anymore appearing. 100% recommend.

This does not instantly kill spiders . It appears to be a nerve agent that cause muscular contractions. Spiders therefore cannot operate for very long on the sprayed area without being disabled. I also think that it has deterrent properties because this summer there are no spider webs on my balcony outside . This absolutely is a win. This is mid July and I also notice there are nearly zero flies and midges on the balcony. Given that my balcony is outside and also subject to rainfall this chemical still works nonetheless. I have a colony of false widow spiders on the balcony which are seriously dangerous . This chemical has wiped out their operations . If you see a spider on the area you have sprayed it wont last long . I note from the reviews that some people dont realise you have to twist the block at the tip of the nozzle to open the spray . The product details says it lasts 6 weeks and this is what I have found. I use about 30% of the bottle on the first spray and use 2 bottles each summer season .