How Effective is Rodent Repellent?

How Effective is Rodent Repellent?

Keeping rodents out is your top priority. Explore different types of rodent repellent and decide which one you want to add to your rodent control toolkit.

The best way to fight rodents is to prevent an infestation before it ever begins. Rats and mice are forever inventing new ways of invading your home. Put up a good defense with well-thought out rodent control strategies.

You are probably familiar with mouse and rat traps. There are a variety of trap styles, and they come in handy when the nasty vermin are already inside your house. But have you heard of rodent repellent? There are a number of repellents on the market that claim to encourage unwelcome rodents to stay off your property all together.

Sound to good to be true? Read up on each type of rodent repellent to learn about the science behind its design and whether or not it is effective in practice. Every home is different, but there are several choices of rodent repellent. We’ll separate myth from fact and help you decide which rodent repellent will be most effective for your needs.

Ultrasonic Rodent Repellent

If you google rodent repellents, you will likely find that ‘ultrasonic’ is the new buzzword. The newest repellent for commercial sale, ultrasonic repellents are very popular because they are simple and convenient to use. But do they live up to the hype? Let’s break it down.

Ultrasonic rodent repellent product

Image courtesy of VENSMILE

How it Works

An ultrasonic rodent repeller is an electronic device that emits special sound waves. They are high frequency and short wavelength. The sound it produces is too high pitched to for humans to hear. Sounds highers than 20 kHz are beyond the range of human hearing. But rodents can register noise in the ultrasonic range. In fact, mouse repellent sound is also used on insects, because some insects can detect frequencies from 50,000 Hz to 100,000 Hz!

Basically, an ultrasonic rodent repellent is designed to produce a rat repellent sound the is so unnerving that it keeps the vermin away.


  • They are cheap, normally costing just $20.
  • They aren’t hard to get. You can find them for retail at your local hardware store or online.
  • They do not use any harmful chemicals, so they are safe for the environment.
  • Some rodent repellent sound devices emit beneficial negative ions that can to purify the air around it.
  • They are generally safe to use around kids.
  • Easy to use and come with clear instructions.
  • Consume very little electricity.


  • An ultrasonic rodent repellent cannot fit it tight crevices, where rodents like to go.
  • Mice may get accustomed to the sound quickly.
  • Repellent can only provide 15 ft of coverage.
  • Sound waves can’t go through objects (walls, fences, etc)

How effective is an ultrasonic rodent repellent? There is no definitive evidence to show that rodent repellent sound truly works. A study conducted by the University of Arizona found that although patents for ultrasonic pest repellents were increasing, commercial ultrasonic repellents were not an effective method of preventing rodent problems.

There have actually been warnings against using ultrasonic rodent repellent. Consumer Reports has advised against using them, and the Federal Trade Commission has also warned consumers not to waste their money. The bottom line is that there is no proof of the claims manufacturers make about the effectiveness of the repellent.

Natural Rodent Repellent

There are several household items that are commonly used as natural rodent repellents. You might even have them on hand in your pantry or utility closet!

How it Works

Moth balls are an age-old solution for repelling rodents.  This DIY repellent method is thought to work because they contain naphthalene. Naphthalene is a solid  white substance, with a strong odor. When a rat or mouse inhales or ingests the substance it can cause blood cells to lose their ability to carry oxygen. The rodents will stay away out of self-preservation, or die.

Peppermint essential oil is another popular remedy for repelling rodents. Rats and mice have a keen and sensitive sense of smell. In strong doses peppermint oil can be very potent. The overpowering stench is supposed to keep the rodents away.


  • Natural repellents are safe to use around children.
  • They can be used around pets.
  • They are eco-friendly.
  • They are super inexpensive.
  • You might already have a natural repellent at the house.
  • They are easy to try.


  • Results are inconsistent.
  • Repellent effect may be short-lived.
  • Rats and mice are smart and can simply avoid the natural repellent.
  • Natural repellent affects only a very small area.

How effective is are natural rodent repellents? Natural repellents are only mildly effective at best. Results are usually short-lived and very inconsistent. Although it may be better than nothing, you should never hedge your bet on a natural repellent.

Spray Rodent Repellent

Different sprays include different formulas, but all rely on the rodents sense of smell.

Spray rodent repellent

Image courtesy of chezbeate

How it Works

Spray rodent repellent is not a certain formula or recipe. Each brand and manufacturer makes it differently. But all sprays put out a certain smell or taste is unbearable to rodents.


  • Sprays are inexpensive.
  • They can be used in hard to reach places.
  • Sprays can be weather and water resistant.
  • They can be long-lasting.
  • Some sprays are organic and eco-friendly.


  • Sprays are not well-regulated.
  • Sprays may be harmful to pets or children.
  • Sprays may inadvertently affect other wildlife.

How effective is spray rodent repellent? There isn’t any hard evidence presented by the manufacturers that rodent repellent spray has positive results. In fact, not only are manufacturers allowed to market their product without scientific proof, there are not bound by any government regulations. This lack of oversight means there is a possibility that some sprays may even have harmful effects. Overall, there is no conclusive research to prove that sprays for rodent control are effective at all.

The Best Rodent Repellent

There are many quick fixes on the market, but the best rodent repellent is an action plan developed with a team of professionals.

How it Works

To avoid infestation, you need to prevent the problem from even beginning by following a rodent control action plan. This is all about fortifying and taking care of your home. Seal all holes, cracks, and crevices on the inside and exterior of your house. Rats and mice will squeeze through holes the size of a quarter- or even smaller! Keeping all storage areas of your home, such as the attic, basement, and kitchen clean and organized is also highly important. When you eliminate clutter and mess, you take away the temptation and opportunity for rodents to hide and nest.


  • The only rodent repellent method with a strong track record of efficiency.
  • Keeping a clean space will also prevent insect infestation.
  • Getting storage organized helps to keep your items safe and secure.
  • Deep cleaning the attic can also make it more operational and energy efficient.
  • Sealing all entry points will also prevent unwanted leaking or draft.
  • Following the steps in a rodent control action plan will also deter other vermin such as squirrels and raccoons from invading your property.
  • Teaming up with professionals will ensure that your home is correctly fortified and can successfully repel rodents.
  • Will safely protect the entire home, kids and pets included.
  • Money well spent.


  • This method of rodent repellent takes more time and effort.
  • It is not a one-and-done application or solution, it is an ongoing process.
  • Will require financial investment greater than the $20+ dollars you would spend on a spray or ultrasonic device.

How effective is a rodent control action plan? With thoughtful planning and proper execution, these rodent control steps are highly effective at repelling rodents. The experts at GRC have years of experience implementing these practices and have a formula for success.

Like most things, when it comes to rodent repellent you get what you pay for. Sure you can pick up a cheap, one-and-done fix at the hardware store. But these types of repellents have not been proven to be effective. They will not protect your whole house. If you are serious about repelling rodents and stopping an infestation before it begins, don’t DIY it. Be prepared to invest the time and money it takes for an effective rodent repellent method.

Contact Green Rat Control and learn how to make your rodent control action plan today!