Ultrasonic or scent marten deterrent
Updated: 22 October 2026
You are choosing an ultrasonic or scent marten deterrent for the same bay or garage, and the two amazon.co.uk pages sound as if they do the same job. They do not. A geraniol spray, an unnamed pouch and a sounder fail in different ways, and neither side in this set has a measured expulsion rate. The [marten deterrent comparison](/hub/pest-control/marten-deterrent) holds the full grid. This page is the fork. The Products Compared editorial team compared the listings on 21 October 2026 and did not test them in a bay. A qualifying purchase can earn a commission at no extra cost to you.
You are choosing an ultrasonic or scent marten deterrent for the same bay or garage, and the two amazon.co.uk pages sound as if they do the same job. They do not.
You are choosing an ultrasonic or scent marten deterrent for the same bay or garage, and the two amazon.co.uk pages sound as if they do the same job. They do not. A geraniol spray, an unnamed pouch and a sounder fail in different ways, and neither side in this set has a measured expulsion rate. The marten deterrent comparison holds the full grid. This page is the fork. The Products Compared editorial team compared the listings on 21 October 2026 and did not test them in a bay. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Type | Frequency or mechanism | Cut-out or reapply | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  BMUT BMUT geraniol marten spray | Scent spray | Geraniol | Bullet: after a few weeks. Reviews: every 3 or 4 days | 8.4 | about £16.00 | View offer |
 ISOTRONIC ISOTRONIC 78580 ultrasound and flash | Ultrasound | 12–24 kHz, plus a flash about every 60 seconds | No vibration sensor in the bullets | 7.8 | about £32.45 | View offer | |
| Alternative |  AROBA Kunagone scent pouch | Scent pouch | Scent similar to a natural enemy. Ingredient not named | Seller: 3 to 6 months. Dose rises if an animal is already there | 1.0 | about £5.86 | View offer |
On this page
What the two smells in this set are
BMUT MS-500 is a 500 ml water-based geraniol spray at £16.00, rated 4.1 from 385 reviews, with a mist and a jet for a car, an engine bay, an attic or a garage. It prints the German number N-111079 and does not print an HSE number. The bullet says you repeat the spray after a few weeks. Reviews say every three or four days, or the animal returns. A weak head that lets liquid run down the bottle is a repeated complaint. Kunagone is not the same product. One AROBA pouch costs £5.86. The bullets say a fragrance similar to a natural enemy, with a life of 3 to 6 months, and they do not name an ingredient. If an animal is already there, the bullet says two to five pouches while the box contains one. There is no star line. You cannot treat Kunagone as a cheaper BMUT.
What the sounders add and what they do not prove
A sounder adds a frequency line, a flash and a power choice. ISOTRONIC 78580 at £32.45 states 12–24 kHz, a flash about every 60 seconds, a claim of up to 40 m², and four AA cells or a car battery, with 3.8 from 320 reviews. Its bullets do not state a vibration sensor. A UK review on 19 June 2025 reported no effect on rats and squirrels after more than a week. The £7.99 unit states 9–65 kHz, and reviews say adults hear a beep. Veddelholzer at £24.26 states 23–44 kHz and a seller line that the sound is usually inaudible. Usually is not a promise you will hear nothing. A UK review of vsshe on 16 January 2026 said the effect faded and rats chewed the device's wires. Claims of 20, 40 and 70 m² are seller text. The best marten deterrent page names which sounder matches which job once you have chosen sound.
Rules that apply to one side only
HSE's biocides guidance puts a chemical repellent, including one that does not kill, inside biocidal-product rules, and a purely physical device outside them. Ultrasound is sold as a physical means. A geraniol spray is sold as a chemical smell. Kunagone names no ingredient, so you cannot check an active from the page. This article does not state whether geraniol holds a Great Britain approval. N-111079 remains a German number. Spikes are physical and they are not ultrasound. ISOTRONIC 84025 belongs with pine marten law on the pine marten loft deterrent page. The £7.99 level 2 alarm is aimed at dogs and cats as well as squirrels. If a pet shares the garage, that mode is a reason to leave the unit. Wiring steps for a 12 V lead are on the how to fit a marten deterrent in a car page.
A straight choice
Choose the BMUT spray when you will respray every three or four days and you want the largest review file, no-effect notes included. Skip it when you need an HSE number on the page. Choose the Kunagone pouch when you want one unpowered object at £5.86 and you accept an empty review file and an unnamed scent. Choose ultrasound when you want a box you do not respray, and you have matched the power: cells or a car lead for 78580, USB for Veddelholzer, or the sensor pair if the engine must switch the unit off. Skip ultrasound when the June no-effect review matches your rats and squirrels, or when the job is a downpipe. This set has no result for geraniol plus ultrasound together. The marten deterrent buying guide puts species and place ahead of this fork if the job is still unclear.
Common questions
Does ultrasound replace a spray?
It replaces the task, not the evidence. A sounder asks for power and a clear speaker. A geraniol spray asks for repeat doses, and reviewers say the nozzle can dribble. Both have reviews of no effect. Pick the maintenance you will actually do.
Are ultrasonic units silent?
Do not buy them on that assumption. The £7.99 reviews say adults hear a beep, and level 2 is an alarm. Veddelholzer's seller says the sound is usually inaudible and that hearing changes with age. If silence in a room over a garage matters, read those notes before you fit a unit under that floor.
Does a changing frequency stop habituation?
Several bullets claim a changing tone so animals do not settle. A UK review of vsshe, dated 16 January 2026, said the rodents became comfortable and chewed the device's wires. A UK review of 78580 reported no effect after a week. Treat the slogan as seller text.
Which type needs an authorisation question?
The chemical smell does. HSE treats chemical repellents as biocidal products and purely physical devices as outside that regime. BMUT prints N-111079, which is not an HSE number. This page does not decide whether geraniol is approved in Great Britain. Ultrasound skips that N-number question and still has no UK trial behind it.
When is neither the right buy because the job is a downpipe?
When the animal is climbing a pipe or a gutter, a speaker and a pouch do not close that route. The object in this set for a downpipe is the stainless spike belt, and only after you have checked it is not a pine marten den. That decision sits on the loft page.
Related pages
Sources
Public UK sources used for the wildlife and biocides points. Shelf prices, stars and review counts are the amazon.co.uk figures in the amazon.co.uk lines for these nine listings.
- NatureScot, protected pine martens (retrieved 22 October 2026)
- Mammal Society, pine marten (retrieved 22 October 2026)
- DAERA, pine marten (retrieved 22 October 2026)
- DAERA, pine martens in houses (retrieved 22 October 2026)
- HSE, is it a biocidal product (retrieved 22 October 2026)
- RAC Drive, rodent vehicle damage (retrieved 22 October 2026)
- Herr and colleagues, stone martens and cars (retrieved 22 October 2026)
- Vincent Wildlife Trust, pine marten leaflet (retrieved 22 October 2026)