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Fly and wasp killer spray UK

Updated: 22 October 2026

A wasp is on the inside of the kitchen window, or the fruit bowl has been a fly trap since the heat started, and you want a fly and wasp killer spray UK shops actually sell as an indoor aerosol. This page stays on three multipacks: Raid's six-can listing, Raid's duo, and Sanmex's three-pack. Provanto is a plant trigger and PestShield is a bed-bug aerosol, so they are outside this job even though they sit on the [bug spray](/hub/pest-control/bug-spray) table. Prices are saved amazon.co.uk figures from 20 October 2026. Peter F., editor for DIY & tools at productscompared.co.uk, did not run a lab test. A purchase through our links can earn a commission at no extra cost to you.

A wasp is on the inside of the kitchen window, or the fruit bowl has been a fly trap since the heat started, and you want a fly and wasp killer spray UK shops actually sell as an indoor aerosol.

Our top picks

Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml

Best overall

Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml
8.2/10about £19.99
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Raid Raid Rapid Action fly, wasp and mosquito killer, 2 × 300 ml

Alternative

Raid Raid Rapid Action fly, wasp and mosquito killer, 2 × 300 ml
6.0/10about £8.70
View offer
Sanmex Sanmex fly and wasp killer aerosol, 3 × 300 ml

Best value

Sanmex Sanmex fly and wasp killer aerosol, 3 × 300 ml
6.4/10about £6.22
View offer
On this page
  1. 1.Three packs, three litre prices
  2. 2.What kills in seconds survives in the reviews
  3. 3.Ventilation, flames and marks
  4. 4.When the spray is the wrong tool

Three packs, three litre prices

Raid Rapid Action fly and wasp killer, ASIN B0132UWC5A, is six 300 ml aerosols, 1.8 litres, at £19.99, about £11.11 a litre. The volume field shows 300 ml per can. The unit-count fields on the same card do not line up cleanly, so you still count six tins when the parcel arrives. Raid Rapid Action fly, wasp and mosquito killer, B0GQC3QFRM, is £8.70. The title says 2 × 300 ml. The saved volume fields show 100 ml and a 1.0 millilitre unit count. Treat £8.70 as a shelf price, not as a proven litre price, until you see two 300 ml cans. Sanmex, B07RQDY83Y, is three 300 ml cans at £6.22. Where these three sit against crawling and plant picks is best bug spray UK.

What kills in seconds survives in the reviews

The seconds line is a listing claim, and the direct-spray reviews are the ones that support it. On the six-pack, hot-weather comments describe flies dropping when the spray hits them. On the duo, reviewers talk about dozens of flies from a short burst. Sanmex is praised for the same direct knockdown, at a lower star average. None of the three pages names the active, so you cannot rank them by insecticide from these cards. A US ingredient list is not evidence for the UK can. If you cannot leave the kitchen, none of these three is a comfortable buy. One wasp on the glass, then air and an emptied bin, uses a fraction of a 300 ml can.
Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml

Testsieger

Raid Raid Rapid Action fly and wasp killer, 6 × 300 ml
8.2/10about £19.99
View offer

Ventilation, flames and marks

All three are pressurised aerosols with flammable warnings on amazon.co.uk. The hob goes off before you spray a fly above the cooker. Health and Safety Executive advice for home pesticides is to keep children and pets out during treatment and until surfaces are dry, and not to contaminate food. These three listings ask whether the spray is safe around pets and do not answer. No source used here prints a universal ventilation time in minutes. Smell is where Sanmex and Raid are not interchangeable in the text we have. Raid spends a bullet on a neutral scent. Sanmex's saved listing does not make a scent claim at all. The sequence once you have chosen a can is how to use bug spray indoors.

When the spray is the wrong tool

Stop when the wasp is not a single insect in a room. A nest in a loft, a soffit or a cavity is British Pest Control Association territory, not a multipack emptied up a ladder. Rentokil Insectrol sometimes gets used on flies and wasps in reviews, but the card is an indoor crawling aerosol at £6.30 for 250 ml. It is the named-active buy for ants and similar, not the flying multipack. Provanto will not do this job. If you came here from a bracelet or a DEET bottle, those products are meant to reduce bites on skin, not to knock a wasp off a window.

Common questions

Is the Raid six-pack better value than the duo?
Per litre, yes, if you will use the liquid. The six-pack is about £11.11 a litre for 1.8 litres at £19.99, with 4.6 from 6,783 reviews. The duo is £8.70. Only if both cans are 300 ml is that about £14.50 a litre, and the saved volume fields do not confirm it.
How does Sanmex compare with Raid?
Sanmex is £6.22 for 900 ml, about £6.91 a litre, 4.1 from 4,018 reviews. Raid's six-pack costs more per litre, scores higher, and prints indoor use, a seconds claim and a neutral scent. Sanmex's saved page does not name an active or a use line. Choose Sanmex on price. Choose the six-pack when you want the larger review file and the clearer indoor wording.
Will these sprays stain paint or worktops?
The listings ask and do not answer. Robert Dyas tells Raid users to test an inconspicuous place before a full treatment. Do that on a hidden edge. A blank FAQ is not a guarantee for gloss, stone or fabric. Ventilate afterwards, because the stain check does not replace the airing.
Can I spray a wasp nest with these?
Not as a DIY nest treatment. One wasp in a room can be a direct spray, then you leave and ventilate. A nest in a loft or wall is a job for a pest controller. Pointing a kitchen aerosol into a nest entrance is how people get stung while the colony stays. The British Pest Control Association treats that work as professional.
Do the reviews mention the smell?
Raid's six-pack and duo both claim a neutral scent, and six-pack reviewers mention it repeatedly. They also describe the spray as choking and say not to breathe it in. Sanmex's card makes no scent claim in the text we saved. A neutral bullet does not mean you can stay in the room.
Why are flies back the next day?
Six-pack reviews report that after a room treatment with no other change. The seconds claim is about the insect you hit, not about a closed kitchen staying empty. Cover food, empty the bin, and stop the way in. Another full-room spray the next morning, with people still inside, repeats the choking complaint without fixing the source.

Related pages

Bug spray buying guide

Bug spray

Best bug spray UK: flies, crawling insects, plants

How to use bug spray indoors: direct spray or room

Bug spray vs mosquito repellent: kill spray or skin

Sources

Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these six listings on 20 October 2026. Last checked 22 October 2026.

  1. HSE garden and home pesticides (retrieved 20 October 2026)
  2. HSE garden pesticide search (retrieved 20 October 2026)
  3. RHS chemical use (retrieved 20 October 2026)
  4. HSE biocidal labelling (retrieved 20 October 2026)
  5. Robert Dyas Raid directions (retrieved 20 October 2026)
  6. BPCA wasp advice (retrieved 20 October 2026)