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Indoor fly and wasp killer for the room, not a nest

Updated: October 2026

A hot week has filled the kitchen with flies, or one wasp came in through the back door and will not leave the window. An indoor fly and wasp killer is the can for that room. It is not the can for the nest in the loft. In this comparison the indoor aerosols are the Raid six-pack, the Raid duo, Sanmex, and an unbranded three-pack. The [wasp spray comparison](/hub/pest-control/wasp-spray) sets their prices next to the only nest foam. We did not spray a test room. A qualifying purchase can earn a commission at no extra cost to you.

A hot week has filled the kitchen with flies, or one wasp came in through the back door and will not leave the window. An indoor fly and wasp killer is the can for that room. It is not the can for the nest in the loft.

Our top picks

Raid Raid 6 × 300 ml

Best overall

Raid Raid 6 × 300 ml
8.9/10about £19.99
View offer
Raid Raid duo 2 × 300 ml

Alternative

Raid Raid duo 2 × 300 ml
7.7/10about £8.70
View offer
Sanmex Sanmex 3 × 300 ml

Best value

Sanmex Sanmex 3 × 300 ml
7.2/10about £6.22
View offer
On this page
  1. 1.What these cans are allowed to do
  2. 2.Leave the room
  3. 3.Flies, wasps, and nests
  4. 4.Which indoor pack in this set

What these cans are allowed to do

The Raid six-pack, model 92880, is £19.99 in the extract, 4.6 from 6,783 reviews. The target-species field lists bug, flies, insect, and mosquitoes, and does not say wasp. Tesco prints a sequence for a single 300 ml Raid at £4.50: about 8 to 10 seconds for a room of about 30 cubic metres. That line is not printed on Sanmex or on the unbranded pack. The Raid duo title says 2 × 300 ml and the volume field says 100 ml. Sanmex says fly and wasp in the title and Ant in the target field. None of these extracts shows an HSE number.

Leave the room

Reviews on the Raid duo mention a choking mist and a stiff button. A review on the unbranded pack mentions throat irritation. Those are buyer reports, not a measured exposure study. The Raid bullets do not answer pets or stains. One Raid review says remove pets and cover a fish tank before spraying. That is one buyer's practice, not a clearance. The stop-list, including allergy and species, is how to use wasp nest foam.
Raid Raid 6 × 300 ml

Testsieger

Raid Raid 6 × 300 ml
8.9/10about £19.99
View offer

Flies, wasps, and nests

A direct hit on a single wasp at the window is still the indoor job. A nest is not. Spelthorne Borough Council says an ordinary fly aerosol does not penetrate a large colony and makes wasps aggressive. Dust is not in this product set. One review of the unbranded pack describes almost a full can in a loft without clearing a wasp. If you can see a colony, the foam page is wasp nest killer foam.

Which indoor pack in this set

The six-pack is the top pick for a season of indoor flies and the occasional wasp in a room. The unit-count field wrongly says 6.0 millilitres, so check the box. Sanmex at £6.22 is the best value on price, and only if the can's own label says fly and wasp. The unbranded pack at £12.85 has no manufacturer. Who should skip all four is best wasp spray UK. Foam, powder, or a person is the wasp spray buying guide.

Common questions

Can I use this indoors?
The Raid six-pack and the Raid duo say indoors, as a direct spray or a room treatment. Sanmex and the unbranded pack put fly and wasp, or indoors and outdoors, in the title, with fields that do not back the title up. Use a can indoors only when its own label allows that room. Indoor permission is not permission to spray a nest in the loft.
How long do I leave the room?
Tesco's Raid directions say about 15 minutes, then ventilate. That text is for a single 300 ml Raid, not a measured time we took in your kitchen, and it is not printed in the Sanmex extract. Follow the label on the can you are holding if the minutes differ.
Will it stain walls or furniture?
The amazon.co.uk extracts ask about stains and do not answer. Tesco's Raid page says to check an inconspicuous spot, and to stay about a metre from walls and fabrics while you spray. Attribute that caution to the Tesco text. It is not a promise that Sanmex or the unbranded cans are stain-free, and it is not a lab result for paint or upholstery.
Is it safe around pets and a fish tank?
The bullets do not say. One Raid review says remove pets and cover a fish tank first. That is sensible caution from a buyer, not a safety claim, and airing the room afterwards does not turn it into a rule for every pet. If you cannot move the animal out, do not spray that room. Nothing here is a veterinary clearance.
Will it kill a nest in the loft?
No. These are knockdown aerosols. Spelthorne says a fly spray does not penetrate a large colony and can make wasps aggressive. A loft review on the unbranded pack used nearly a full can without clearing a wasp. A visible nest needs a nest foam, from a distance, or a person if it is above head height.
Why do wasps take longer than flies?
In the Raid six-pack reviews, flies are the usual quick result, and wasps or a large hornet are described as needing more spray, sometimes 20 to 30 seconds. One buyer found house flies took minutes. That is a direct-hit observation, not evidence the can will collapse a colony if you keep spraying.
Is the Sanmex three-pack the same job as Raid?
It is sold as a cheap indoor fly spray, at £6.22 for a stated 3 × 300 ml, and reviewers often compare it with Raid on price and on a weaker jet. The listing's target species says Ant, so the page is less clear than Raid's indoor bullets. Same broad job only if the can you receive is labelled for flies and wasps. It is not the same job as Zero In nest foam.

Related pages

Wasp spray

Best wasp spray UK for a nest or for flies indoors

Wasp spray buying guide: foam, aerosol, or a person

How to use wasp nest foam: dusk, distance, and stop

Wasp nest killer foam and the disputed 4 metre jet

Sources

Public UK sources and the amazon.co.uk listings in this set, last checked on 16 October 2026.

  1. HSE, COPR conditions (retrieved 16 October 2026)
  2. HSE, COPR product types (retrieved 16 October 2026)
  3. HSE, honey bees and biocides (retrieved 16 October 2026)
  4. NHS, insect bites and stings (retrieved 16 October 2026)
  5. NHS, anaphylaxis (retrieved 16 October 2026)
  6. BPCA, wasp control (retrieved 16 October 2026)
  7. Leeds City Council, pest control (retrieved 16 October 2026)
  8. NNSS, yellow-legged hornet update (retrieved 16 October 2026)