The best silverfish sprays, compared.
Top pick: NOPE! CP Silverfish Killer Spray, pack of 2 – Highest listing score, cypermethrin named, and the only large review set whose texts are about silverfish. Best value: Rentokil Insectrol Insect Killer Spray 600 ml – 600 ml at about £10; the cheaper 30 ml bottle states no dose and the reviewer wanted a larger size. Updated 17.10.2026.
Silverfish keep turning up in a bath, a damp cupboard, or among paper and stored food, and the bottle in the search results is not always an insecticide. Quality is whether the bottle is a residual insecticide with a named active and an amateur label, or an essential-oil deterrent with no HSE number and no stated dose. On amazon.co.uk those two kinds share the same search results and the same adjectives. You tell them apart by the active substance, the pack size, and what the reviews are actually about. This comparison puts seven listings side by side. How those types differ is set out in the [silverfish spray buying guide](/hub/pest-control/silverfish-spray/sub/silverfish-spray-buying-guide). Always read the label and product information before use.
Silverfish keep turning up in a bath, a damp cupboard, or among paper and stored food, and the bottle in the search results is not always an insecticide.
26 products checked · 58 hrs invested · +21,460 readers
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Personal buying guide
Question 1 of 2
What do you want the listing to show?
The NOPE! CP twin pack is the only bottle in this set whose amazon.co.uk reviews are about silverfish: two 500 ml water-based sprays at £27.98, rated 4.5 from 715 reviews, with cypermethrin named and a residual claim of up to three months. That duration is the seller’s claim, not a result we measured. Safeguard’s sheet, rather than this Amazon page, quotes HSE No. 10815 and 25–50 ml per square metre, while the listing mentions HSE and does not print the number. The part number still says 5 L, which does not match the twin pack or the 1,000 ml volume field, so check the bottle in the basket. Of the 50 review texts read, many report little or no smell, and others say the smell was stronger than an odourless claim and lingered. It is the top pick when you want a silverfish-named residual spray with a large relevant review set, and a poor fit if the HSE number must appear on the Amazon page itself.
Pros
Cons
Best for: A silverfish-named residual spray when you can check the twin pack against the 5 L part number
Less suitable: Anyone who needs HSE 10815 printed on the Amazon page before they order
Specifications
Common questions
What active substance does this listing name?
Cypermethrin. The specification line says HSE, but this amazon.co.uk file does not print an HSE number.
How much liquid is in the pack?
The title is two 500 ml bottles and the liquid-volume field is 1,000 millilitres. The part number says 5 L, which conflicts with both.
Do the reviews say it leaves a smell?
Many of the 50 review texts report little or no smell. Others say the smell was stronger than the odourless claim and lingered.
Rentokil Insectrol is a 600 ml crawling-insect aerosol at £10, and the listing tells you to spray cracks, crevices and skirtings from 20–25 cm. It claims a residual barrier and does not state that barrier as a number of weeks. The bullets name ants, cockroaches, fleas, bedbugs, beetles, earwigs and woodlice, and they do not name silverfish or print an active substance. The 4.4 from 7,074 reviews is a large record, and the texts in the file are about those other insects, so they are not a silverfish trial. Rentokil’s own site names cyphenothrin and 1R-trans phenothrin and does include silverfish, which is a different page from the bullets in your basket. It is the best value if you want a cheap residual aerosol and you will read the can for the pest list.
Pros
Cons
Best for: A £10 residual aerosol for the insects named in the bullets, if you then check the can
Less suitable: Anyone who will only buy a listing that already says silverfish and names an active
Specifications
Common questions
Does this amazon.co.uk listing name silverfish?
No. The bullets name ants, cockroaches, fleas, bedbugs, beetles, earwigs and woodlice. Silverfish is not in the specification block.
What do the reviews actually discuss?
The texts in the saved listing are about spiders, ants, flies, cockroaches, earwigs and similar insects. They are not a silverfish trial.
Is an active substance printed on this listing?
No. The saved listing does not print an active substance. The form is an aerosol, 600 ml, model FS138.
The 30 ml DD teck spray is the smallest bottle in the set, at £3.79, and it is rated 4.4 from three reviews. The only text says the reviewer sprayed skirtings, the bed area and kitchen cupboards, noticed a slight smell, and would buy a larger bottle. That slight smell sits against an odourless claim, and the scent field is cinnamon while a bullet also mentions mint. The listing claims up to 12 weeks and does not state a dose, so 30 ml is not a stated whole-home treatment. No active substance and no HSE number appear. It is a cheap way to try a cinnamon-scented oil on a short run of skirting, and a poor substitute for a residual insecticide once insects are in more than one room.
Pros
Cons
Best for: A small trial on skirtings if you already expect to need more liquid
Less suitable: A whole flat, or anyone who needs a named insecticide active
Specifications
Common questions
Is 30 ml enough for a whole home?
The listing does not state a dose. The only reviewer sprayed skirtings, the bed area and kitchen cupboards, then said they would buy a larger bottle.
Does the review match the odourless claim?
No. The reviewer found a slight odour. They still said it was not enough to put them off, and they called it pet safe.
What scent is listed?
Cinnamon (Cinnamomum verum). A bullet also mentions a minty scent.
UK GROW’s 1 litre listing is the oil bottle whose title and specification agree on the fill. It is £18.99, the scent is lavender, and the page says reapply every 2–3 weeks in bathrooms, kitchens, basements and closets. No active substance and no HSE number appear, and the target-species field is empty even though the title says silverfish. The amazon.co.uk line is 4.0 from one rating, with no review text, so there is no buyer account of whether silverfish stayed away. A non-staining claim is paired with advice to spot-test, which is worth doing on a skirting before you treat a longer run. Treat it as a scented deterrent you would refresh, and a weak stand-in for a residual insecticide once insects are established.
Pros
Cons
Best for: A 1 litre lavender deterrent when you accept a 2–3 week refresh and almost no reviews
Less suitable: An established infestation, or anyone who wants a named insecticide active
Specifications
Common questions
How often does the listing say to reapply?
Every 2–3 weeks. That is a listing claim, not a measured residual.
Is an active substance stated?
No. The form is oil, the scent is lavender, and the model number is UKGROWSILVERFISH.
What do buyers report?
The saved listing has a 4.0 from 1 rating and no review text, so there is no written account of whether silverfish stayed away.
This UK GROW listing does not tell you how much liquid you are buying. The title says 500 ml and the specification, unit count and size say 1 litre, so the fill is unresolved at £14.99. It shares the model string UKGROWSILVERFISH with the £18.99 bottle, and the scent here is lavender and peppermint rather than lavender alone. Reapply every 2–3 weeks is the same listing claim, and it is not a measured residual. The rating is 3.2 from four ratings, the file has no review text, and no active or HSE number is stated. Order it only if the label on the delivered bottle settles the volume you meant to pay for.
Pros
Cons
Best for: Only after the label in the parcel shows the fill you meant to buy
Less suitable: Anyone comparing price per litre, because the litre is not settled on the page
Specifications
Common questions
Is this a 500 ml or a 1 litre bottle?
The title says 500 ml. Item volume, unit count and size all say 1 litre. Treat the fill as unresolved.
How does it differ from the other UK GROW listing?
Both use model UKGROWSILVERFISH. This one is £14.99 with a lavender and peppermint scent. The other title and spec agree on 1 litre at £18.99 with lavender only.
Are there written reviews?
No. The listing shows 3.2 from 4 ratings and the saved listing has no review text.
The 100 ml DD teck bottle is £5.99 and claims up to 12 weeks, with silverfish among the named crawling insects. The rating is 2.8 from three reviews, and the only text does not mention insects: the nozzle did not spray and the liquid leaked. Item weight is 100 g and the dimensions are 14.8 × 6 × 2 cm, so this is a spot bottle rather than a can for a whole flat. No active substance is named, and the plant-based and chemical-free wording is a listing claim, not an authorisation. A non-staining line is untested in that review. Leave it until a later review describes insect control rather than a failed nozzle.
Pros
Cons
Best for: No current buyer, until a review describes the spray working rather than a failed nozzle
Less suitable: A first treatment of skirtings, because the only report is that it did not spray
Specifications
Common questions
Did the spray work in the review?
The only review does not discuss insects. It says the nozzle did not spray and the liquid leaked.
What is the fill size?
100 millilitres. Item weight is 100 g. Dimensions are 14.8 x 6 x 2 cm.
Is a chemical active named?
No. The listing calls the formula plant-based and chemical-free. That wording is a claim, not an authorisation.
The 1,000 ml DD teck listing is £16.99 and names silverfish, firebrats, booklice and other crawling insects. The title says the effect lasts up to three months and a bullet says up to 12 weeks, so the duration is not one claim. The title also says odourless, a bullet says minty, and the scent field is Cedrus. No active substance and no HSE number are stated, and the saved listing has no customer-review line, so there is no star rating to weigh. A non-staining claim is on the listing and is untested here. It is a large oil-style bottle with no buyer record in this file, which is too thin to treat as a proven silverfish treatment.
Pros
Cons
Best for: A 1 litre scented bottle only if you can accept an empty review line
Less suitable: Anyone using stars or a single duration claim to choose a silverfish spray
Specifications
Common questions
How long does the listing say it lasts?
The title says up to 3 months. A bullet says up to 12 weeks. Those are not the same claim, and neither is a test result in this file.
Is it odourless?
The title says odourless. A bullet describes a minty scent. The scent field is Cedrus.
Is there a star rating?
No customer-review line is in the saved listing, so there is no star rating to use.
Scores are out of 100 from the amazon.co.uk listings in this set, dated 16 October 2026. This is not a lab test. Stars, review relevance, the listing job and price usefulness are the four positive parts, with maxima of 40, 20, 24 and 12. The weights below scale those maxima so they sum to 100. Deductions apply when a pack size, a duration line or a review contradicts the listing.
Amazon star rating
42%Star points are the amazon.co.uk rating times 8, up to 40 before scaling. A missing star line scores 0. A 4.5 scores 36 and a 4.4 scores 35.
Review relevance
21%Up to 20 points before scaling. A large set whose texts are about silverfish scores higher than a large set about other insects, or a handful of ratings with no text.
Listing job
25%Up to 24 points before scaling: a named active, silverfish named as a target, volume fields that agree, and an HSE mention on the listing. Mentioning HSE is not an endorsement.
Price usefulness
12%Up to 12 points before scaling. The £10 residual aerosol scores higher than a 30 ml bottle or a listing whose fill is unresolved.
The bottles on this page are not one product type. Some are residual insecticides with a named active. Some are essential-oil deterrents with no stated dose. Price, fill and the insect named in the reviews decide which row is usable. Exeter City Council’s advice is a light residual spray on affected areas, not on a work surface. A three-month or 12-week line is a listing claim. It is not a result from this comparison.
A silverfish spray is a liquid you apply in a UK home to kill or deter silverfish (Lepisma saccharinum) and, on some labels, firebrats and other crawling insects. People buy one after insects keep appearing in a bath, a damp cupboard, or among paper and stored food. On amazon.co.uk a residual insecticide and an essential-oil deterrent share the same search results. You tell them apart by the active substance, the pack size, and what the reviews are actually about.
This comparison is a spray. Glue traps, smoke bombs and body oils are different products, even when the search results mix them in. Start with the form, then the active.
Exeter City Council says a light residual spray belongs on affected areas, not on a work surface. Keep food-contact surfaces untreated. Middlesbrough Council says do not wash residue off skirtings, cracks and pipe runs for 5 to 7 days.
The 4.4 from 7,074 ratings is a large record about other insects. The Amazon bullets name ants, cockroaches, fleas, bedbugs, beetles, earwigs and woodlice. They do not name silverfish. A non-toxic bullet on an oil bottle is not a safety clearance either.
Product type comes first. Keep a spray. Glue traps, smoke bombs and body oils are different products. The legal job comes next. A kill claim belongs with an insecticide, GB BPR product type 18 or a COPR approval, that names the pest and amateur use. Northern Ireland follows EU BPR. Great Britain follows GB BPR. A scented deterrent is a different purchase. NOPE! states cypermethrin. Safeguard’s sheet quotes HSE No. 10815, cypermethrin 0.1% and benzalkonium chloride 0.1%.
Volume is the next check after the active. A 30–100 ml bottle is a spot size. Reviewers who treat skirtings are using 600 ml or a twin pack of 500 ml. The NOPE! title is two 500 ml bottles and the liquid-volume field is 1,000 ml, while the part number says 5 L. Treat that conflict as unresolved until the bottle in the basket matches. UK GROW’s £18.99 listing agrees on 1 litre. The £14.99 listing says 500 ml in the title and 1 litre in the specification, so price per litre is not settled.
Three typical situations, each with a recommendation from this comparison.
You keep finding insects in a bath, a kitchen or a damp cupboard and you want a bottle the same week. NOPE! CP names silverfish and cypermethrin, and the review texts are about silverfish. Check the 5 L part number against the two 500 ml bottles before you pay.
You want a residual aerosol at about £10 and you will read the can for the pest list. Rentokil Insectrol is 600 ml and tells you to spray cracks and skirtings from 20–25 cm. These Amazon bullets do not name silverfish, and the review texts are about other insects.
You only want to try a scented oil on a short run, and you already expect to need more liquid. The 30 ml DD teck bottle is the lowest shelf price in the set. The only reviewer sprayed skirtings and cupboards, noticed a slight smell, and wanted a larger bottle. No dose and no active are stated.
The highest score is NOPE! CP at 84. It is the only listing in this set whose review texts are about silverfish, and cypermethrin is named, so it is the top pick. The part number still says 5 L, which does not match two 500 ml bottles. Rentokil Insectrol is the best value: 600 ml at about £10. The 30 ml DD teck bottle is cheaper per bottle and scores 56, and it does not take that badge, because the only reviewer wanted a larger size and the listing states no dose.
NOPE! CP Silverfish Killer Spray, pack of 2
Highest listing score, cypermethrin named, and the only large review set whose texts are about silverfish.
Rentokil Insectrol Insect Killer Spray 600 ml
600 ml at about £10; the cheaper 30 ml bottle states no dose and the reviewer wanted a larger size.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public sources from the research digest, checked on 16.10.2026. Shelf prices are the amazon.co.uk listings in this set.
This article contains affiliate links. If you buy through one of them, we may earn a small commission at no extra cost to you. Scores follow the listing method on this page and do not change because of that commission.
