Pest ExpertSuper Fumer Cluster Fly Killer Smoke Bomb 6 x 11g - Formula 'P' Cluster Fly Fumigator (HSE approved and tested – professional strength product)

Worked very well for flies in our attic. We set off 2 bombs on one day in different attics, and again one week later. Not had any flies since. We will keep the last 2 of the set of 6 that we bought, and perhaps set those off later in the year as an insurance policy! There is a definite smell. I would advise that you close all doors of the room where the loft hatch is, and open windows where possible. We did ours first thing in the morning so that it had all day for the smell to go, as our bedroom was next to the room where one loft hatch was. The other loft hatch was in the hall which also ajoined our bedroom, so we closed the bedroom door and opened the windows wide in there too. The smell hung around for 2 days and unfortunately, the smell still got into our bedroom because it seeped through our downlighters in the bedroom ceiling - so if you have downlighters, do tape up around them first, to seal them really well, before lighting the bombs, and make sure no one turns the lights on while they are taped up, to prevent electrical accidents!! It took a few minutes for the smoke bomb to really smoke, but I would advise that the person lighting up the smoke bomb, wear a mask just in case, especially if they are sensitive. All in all, a very effective product.

Great Product that does the job.

I used two of these in quite a large loft space. All cluster flies were either killed for forced to leave. I use once a year in September and the flies are gone until the following summer.

I have bought this product multiple times to treat cluster fly issues in various loft spaces and out-buildings on a farm. The product is easy to light, with a good wick.It does emit a large amount of smoke, so be aware of smoke alarms and be careful not to inhale. It can permeate through down-lights as mentioned in other reviews, and can impact any fabric in a room. I'd agree that the product has low residual odour but still persists for several days. You need a heat-proof base to go underneath the bomb as it does get hot as it burns.Expect to need multiple treatments, with 2x per year a good recommendation.Very effective product and would purchase again.

Does the job!

Kills flies effectively

Used 2 in large loft. Put both on saucers (as suggested). Covered over cctv recorder & broadband router. No more flies & electrical goods work fine. Recommend purchase as very effective goods.

This product was amazing, got rid of all cluster flies throughout our house. We are renovating and have floors up and open wall spaces so I was sceptical if it would work in such a large open space. No more horrible flies thanks to this brilliant product.