5 Best Outdoor Cat Repellents in 2021 – Reviews & Top Picks

Though they are a popular companion animal, domesticated cats are one of the most virulent pest animals, and their outdoor presence can be devastating to local flora and fauna populations.

People with and without pets may find themselves the victims of particularly ornery populations of stray cats. There are many products on the market and lots of DIY tips for keeping cats out of your yard, which we’ll cover below. Doing so can help keep your animals and plants safe and, in the case of many people with dogs, keep stray cats safe too.

Here are the five best cat repellents for your yard on the market!


A Quick Comparison of Our Favorites

The 5 Best Outdoor Cat Repellents – Reviews & Top Picks 2021

1. Cat Mace – Best Overall

Nature's Mace Cat Repellent

Form Concentrate, Spray
Unit Size 40 oz (Concentrate or Spray), 1 gallon (Concentrate), 1 gallon (Ready-to-use Concentrate)
Protection Area 15,000 sq feet (1 gallon)

Our choice for the best overall cat repellent for your yard on the market is Nature’s Mace Cat Mace. This repellent comes in multiple forms, can be used indoors or outdoors, and is safe for plants, animals, and children.

Cat Mace boasts all-natural ingredients that are known for keeping cats at bay. However, as with any commercially made product, there may be ingredients that did not get listed

You can buy Cat Mace as a spray, concentrate, or a ready-to-spray concentrate with a hose nozzle that you can spray on your yard. A one-gallon bottle of concentrate can treat a 15,000 sq ft area, so it’s very cost-effective.

As with any yard treatment, you’ll want to avoid all contact with the treated area until the spray has had time to completely dry. Many sprays recommend that you avoid the area for 24 hours and reapply the spray if it rains.


  • Multiple spray options
  • Natural ingredients
  • Great protection radius


  • You will need to avoid the treated area for 24 hours

2. Cat Scat Mat – Best Value


Form Mat
Unit Size 71.5 square feet
Protection Area Varies depending on how it is used

PetKeen’s best outdoor cat repellent for the money is the Cat Scat Mat. This is a PP material mat with small spikes that can be cut and linked together to create a barrier around an area. The tips aren’t enough to harm the animals but will gently deter them from trying to walk further into your property.

You can use the Cat Scat Mat to mark off


  • Effective against all animals with feet
  • Cost-effective for creating a barrier around your
  • Spikes work as both an anti-walk and anti-climb deterrent


  • It could prevent you from going barefoot in your yard, depending on the placement

3. Bonide Go Away! Cat, Dog, & Rabbit Repellent – Premium Choice

Bonide Go Away! Rabbit, Dog & Cat Repellent

Form Granule
Unit Size 3 lbs
Protection Area Varies depending on usage

Our choice for the best premium outdoor cat repellent is Bonide’s Go Away!. The formula comes in granule form and has a spreader cap, so you don’t need a granule spreader to use it. The instructions recommend that you spread a four-inch-wide barrier of granules around any area you want to protect, which can be pretty costly. Still, it claims to help with behavior modification for cats, dogs, and rabbits.

The granules are made of all-natural repellents like thyme and cinnamon that help ward animals away from your yard. Since the granules are made of all-natural ingredients, they won’t cause any harm to your plants or children. While animals won’t be inclined to put them in their mouths, they’re non-toxic if ingested as well.


  • All-natural
  • Repels a wider variety of animals
  • No need to vacate the treated area


  • Quite expensive to treat a large space

4. Four Paws Keep Off! Repellent for Cats and Kittens

Four Paws Keep Off! Cat Repellent Outdoor & Indoor Spray

Form Spray
Unit Size 16 fl oz
Protection Area Unknown

Keep Off! By Four Paws is a popular spray for indoor use, but it can also be used outdoors. The real downside of this spray is that it has to be applied every day or every other day to be effective. While outdoor use is possible, it seems to have been more of a manufacturing afterthought.

Pet parents looking to permanently keep strays out of their yards might want to pass on this in favor of other products. However, those looking for a spray that can be used indoors and outdoors to help with their own cat’s behavior might find this to be the perfect product since it’s safe for all indoor surfaces, including fabrics and leather.


  • Safe for indoor and outdoor use


  • Not really made for outdoor use
  • Has to be applied every day to be effective

5. PetAG Boundary

Boundary Indoor Outdoor Cat Repellent

Form Spray
Unit Size 22 fl oz
Protection Area Unknown

PetAG’s Boundary is a lot like Keep Off!. It’s a regular spray bottle for indoor and outdoor usage that similarly requires a daily application to be helpful. The notable trait of Boundary is that it’s not safe for children.

Many customers report that the spray has an unpleasant scent and the ingredient information is pretty nebulous, which leads to whether or not this is truly safe for our pets. We know it’s not safe for our children, so it’s hard to think that it would be too different if accidentally ingested by a cat or dog.

Most pet parents will probably want to pass on this one.


  • Unpleasant smell
  • Vague ingredient information
  • Unsafe for children


Buyer’s Guide

When choosing something to repel animals from your yard, there’s always a lot of factors that go into choosing the correct method. We’ve compiled some repellent formulas from the market, but there are excellent DIY options and non-spray options for people who don’t want to use synthetic chemicals in their yards.

When choosing an animal repellent, we, of course, don’t want to harm the animals we’re repelling; we want them to stay away! Some synthetic chemicals in repellents are harmful to animals and may leave animal lovers and pet parents wary. This fear is especially true of those with their own companion animals that consider the backyard part of their homes.

DIY Cat Repellent

There are several do-it-yourself options that pet parents can employ. These options can help humans mark off a boundary that keeps cats away from their yards without using any potentially harmful synthetic materials.

Oil, Wire, or String

Placing a wire or string over the top of a wood or vinyl fence can help deter stray cats from walking along the wall or jumping onto it to get into your yard. The wire doesn’t harm the cats but makes the surface uncomfortable for them to walk on, so they’ll avoid it. This method does rely on the homeowner having the correct kind of fence.

cat fence
Image Credit: Piqses

Coffee Grounds and Citrus Peels

You can mix coffee grounds with citrus peels and spread those like mulch around plants and areas you don’t want cats to enter. The smell of the citrus peels and the feel of the coffee grounds will keep them away from the site.

Coffee grounds also contain several essential minerals that plants can use to grow big and strong. So using this cat repelling fertilizer helps both fronts!

Coffee grounds and citrus peels can be laid anywhere you don’t want cats to go. You can make a perimeter boundary or even fertilize your whole yard with it.


If you don’t want to use coffee grounds, you can use gravel to help ward cats off your plants. Gravel is better used as a perimeter barrier or around certain plants you want to keep the cats away from as it can damage smaller, softer plants like grass.

gravel in garden
Image Credit: Piqsels

Plants That Cats Hate

There are a lot of plants that cats can’t stand. There are several plants to choose from that you can use to beautify your yard and ward away the cats. Coelus canina, rue, and lavender are all plants that cats hate. You can plant them as a perimeter barrier or weave them into your garden to help cats know what places to avoid.

DIY Cat Repellent Spray

You can also make your own cat repellent spray. By doing so, you can control what substances go into the spray but also what — if anything — the spray smells like. While most commercial cat repellent sprays claim not to have any smell, some pet parents may want to have a spray that doubles as an air freshener. Making your spray, you can have that.

siberian cat in garden_Michael Hüttl_Pixabay
Image Credit: Michael Hüttl, Pixabay


While vinegar may have an unpleasant smell to humans, it’s even more unpleasant to cats. With very little diluted vinegar, you can keep cats away because the smell is repugnant to them.

To make this spray, you’ll want to mix one part white vinegar and one part water in a spray bottle. Swirl them together, then add gentle dish soap or Castille soap to the mixture and shake well.

The soap will mask the smell of the vinegar for humans but not for cats. So, they’ll be able to smell the vinegar, but you’ll smell whatever lovely soap you put in the mixture!

Citrus Peel

This recipe calls for citrus peels. Cats hate the smell of citrus, and any citrus peel will work. Take one cup of your citrus peels, two cups of water, two teaspoons of lemon juice, and lemon-scented dish soap.

Start by bringing your water to a boil. Add your cup of citrus peels and simmer them over low heat for 20 minutes. Let the mixture cool for thirty minutes, and then add the mixture to a spray bottle. Remove any large pieces of peel that won’t fit in the bottle, then add two squirts of lemon-scented dish soap and two teaspoons of lemon juice. Shake well, and you’re ready to apply!

orange peel
Image Credit: Pixabay

Orange Juice

Diluted orange juice also makes a great cat deterrent. Mix one part orange juice and one part water, then spray on the area you’d like to treat. Be careful where you apply orange juice, as it will bleach any fabrics that it touches, even if it’s diluted.

Other Kinds of Barriers

If making your own barrier isn’t your speed. There are other non-chemical methods to ward cats out of your yard. Non-chemical deterrents rely on using safe, natural stimuli that cats hate. These deterrents can also be great for keeping other pest animals out of your yard. So, if you’re also looking to keep away other pest animals that are turning your garden into a snack, these could work well for you.

Motion-Activated Sprinklers

Motion-Activated Sprinklers are another great way to keep cats out of your yard. Cats hate water and will flee when the sprinklers activate and blast them with a spray of cold water. There are a lot of different kinds of motion activations, including infrared sensors that have a higher threshold for movement and don’t trigger on leaves blowing by. You can even get timed sensors that won’t go off during certain times of the day so your family can enjoy the yard without worry.

garden sprinkler
Image Credit: Piqsels

Ultrasonic Barrier

Ultrasonic barriers emit sounds that are inaudible to humans but highly uncomfortable to certain animals. By employing one, the animals will avoid the area because it’s uncomfortable to remain in it. Ultrasonic barriers are usually effective against more than just cats since the sounds they emit cause discomfort for more than one pest animal.

Ultrasonic barriers designed explicitly for animals other than cats may have questionable efficacy on cats. However, the ones specifically designed for cats have been shown to reduce the frequency of stray cat visits by 46%.

Ultrasonic barriers can present an effective and safe mechanism to ward offending cats away from the yard. Many of the ones on the market are solar-powered and will require minimal maintenance once set up.



Keeping pest animals out of our yards and helping our pets understand what places they can and can’t go to are essential factors of homeownership. Though it may be hard to think of cats as pest animals, there’s no doubt that a stray cat can do immense damage to a yard. Our choice for the best overall cat repellent is Cat Mace. Cat Mace will get the job done and has great value. Our choice for the best cat repellent for the money was the Cat Scat Mat for pet parents on a budget. Pet parents looking to spend a little more can rely on Bonide’s Go Away! to repel not only cats but also rabbits and dogs. No matter your situation, there are options out there to help you protect your home and pets.

Fetured Image Credit: OCEANPAX, Amazon


Leave a Comment