Pest Pro Reviews Editorial Team • • 8 min read • Best Outdoor Rodent Repellents: Barriers, Granules and Sprays
Best outdoor rodent repellents: YARDGARD hardware cloth, Tomcat granules and spray, Natural Armor and CONKAT pouches, plus how to keep rodents away from your house.
The best rodent repellent for outside is a barrier: YARDGARD's galvanized 1/2-inch hardware cloth over vents, crawl spaces and the gap under decks keeps mice and rats out for years. For scent repellents, Tomcat granules treat soil around the foundation, the Tomcat and Natural Armor sprays cover entry points, and CONKAT pouches suit sheds and trash areas, with regular reapplication.
- Outdoors, rain, sun and wind weaken scent repellents quickly, so they need reapplying about monthly and work best as a backup to sealing.
- Galvanized 1/2-inch hardware cloth, not chicken wire, is what UC IPM recommends for screening vents and openings against rats.
- Removing food and cover around the house does more to keep rodents away than any spray.
What Outdoor Rodent Repellents Can and Cannot Do
An outdoor repellent tries to make the area around your house smell or taste bad enough that mice and rats move on. That is a hard job in the open air: rain washes sprays off, sun breaks down essential oils, and a rodent with food and shelter nearby has every reason to put up with an unpleasant smell.
The result is that buyers of almost every outdoor repellent report mixed effectiveness, and makers tell you to reapply every month or so. Most peppermint-based products are sold as minimum-risk pesticides, which the EPA's conditions for minimum-risk pesticides exempt from registration; the agency says it does not review exempted products.
Repellents still help when they back up the work that keeps rodents out: sealing, clearing food and cover, and trapping the ones already there. For indoor options and sealing products, see our guide to the best rodent repellents for the home.
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Vents, crawl spaces and decks to close.
Mice and rats foraging in mulch and beds.
Rodents plus skunks or raccoons.
Covered outdoor storage.
How We Selected These Outdoor Repellents
We compared products on whether they are made for outdoor use, how long the maker says they last in weather, how much area they cover, how they are applied and what buyers report about effectiveness, smell and sprayers. Our sources were manufacturer listings and labels as described in them, Amazon's review digests, UC IPM guidance and EPA rules for minimum-risk products; we did not test the products.
We left out ultrasonic outdoor repellers, which UC IPM says have little evidence behind them, and sprays meant for enclosed spaces rather than open ground. The first pick is a barrier rather than a scent, because it is the one product here that keeps working without reapplying.
YARDGARD Hardware Cloth: Best Outdoor Rodent Barrier
YARDGARD hardware cloth is a 24-inch x 25-foot roll of 19-gauge galvanized steel mesh with 1/2-inch openings. UC IPM's rat pest guide recommends galvanized 1/2-inch wire cloth for screening openings against rats and warns never to use lightweight chicken wire, which rats pass through.
- The maker says it is galvanized for rust resistance in wet and humid climates.
- It cuts and bends easily for covering vents, crawl-space openings and gaps under decks and sheds.
- Buyers say it is exactly as described, good value and effective at keeping critters out.
- One listing bullet calls the weave hexagonal while the title says welded 1/2-inch mesh; check the mesh when it arrives.
Choose it for foundation and crawl-space vents, the base of decks and porches, and the bottom of sheds, buried a few inches into the soil where rats dig. It is our top pick because it closes the openings rodents use instead of trying to scare them away from them.
YARDGARD 1/2 Inch Hardware Cloth 24 in x 25 ft
Best for: Sealing vents, crawl spaces and gaps under decks
- ✓Matches UC IPM's recommended 1/2-inch mesh
- ✓Galvanized for rust resistance, per the maker
- ✓Buyers say it keeps critters out
- −Takes cutting and fastening work
- −One bullet describes a hexagonal weave; check on arrival
Specifications (3)
- Material
- 19-gauge, galvanized steel mesh
- Water Resistance Level
- Water Resistant
- Color
- Silver
Tomcat Repellents Rodent Repellent Granules: Best for Soil and Landscaping
Tomcat Repellents Rodent Repellent Granules are a 2-pound shaker of essential-oil granules for turf, soil and landscaped areas around a home, garage or outbuilding. The maker says they discourage rodent entry, nesting and foraging outdoors.
- The container covers up to 1,000 square feet, per the maker.
- The granules are rain-resistant, and the maker says to reapply every 30 days.
- Buyers report mixed effectiveness, from rats kept away to no effect.
- Despite the maker's “no stink” description, buyers mostly say the smell is awful, and value feedback is mostly negative.
Pick it for mulch beds, foundation plantings and the soil along a garage where rodents forage. Keep in mind the smell, and keep applying it monthly through the season.
Tomcat Repellents Rodent Repellent Granules 2 lb
Best for: Soil and plantings along the foundation
- ✓Covers up to 1,000 sq ft, per the maker
- ✓Rain-resistant, per the maker
- ✓Simple shaker application
- −Buyers say the smell is awful
- −Mixed effectiveness; reapply every 30 days
Specifications (3)
- Unit Count
- 32 Ounce
- Size
- 32 Ounce (Pack of 1)
- Item Highlight
- Mouse and Rat Repellent for House Exteriors and Garages, Home Rodent Prevention, Rain-Resistant Granules
Tomcat Repellents Rodent Repellent Spray: Best for Entry Points
Tomcat Repellents Rodent Repellent Ready-to-Use is a 1.33-gallon garlic, peppermint and cinnamon oil spray with a battery-powered Comfort Wand. The maker lists it for doors, windows, cracks, crevices, pipes and vents.
- The maker gives coverage of about 3,350 square feet and reapplication every 30 days.
- It is labeled rain-resistant for outdoor use.
- Buyers like the scent and its pet safety, but many say it does not last long enough.
- Sprayer feedback is mostly negative, and value feedback is mostly negative.
Choose it for treating the outside of entry points while you seal them. Do not count on it to keep rodents away alone.
Tomcat Repellents Rodent Repellent 1.33 Gal
Best for: Treating outdoor entry points while you seal them
- ✓Rain-resistant, per the maker
- ✓Battery-powered Comfort Wand
- ✓Buyers like the scent and pet safety
- −Buyers say it does not last long enough
- −Sprayer problems, per some buyers
Specifications (3)
- Item Volume
- 1.33 gallons
- Item Form
- Aerosol
- Target Species
- Rodents
Natural Armor Animal and Rodent Repellent: Best Multi-Pest Spray
Natural Armor Animal and Rodent Repellent is a 128-ounce peppermint-scented spray sold for rats and mice as well as skunks, raccoons and deer. The maker says it covers about 1,000 square feet and lasts up to 90 days without washing off easily.
- It is listed for indoor use in garages and sheds and outdoor use on paths, driveways and gardens.
- Buyers like the natural ingredients and scent.
- Effectiveness feedback is mixed, and value feedback is mostly negative.
- Buyers report trigger sprayers that stop working; the maker says the sprayer is guaranteed not to clog.
Pick it when you want one spray for rodents and larger yard pests around gardens and sheds. Expect to reapply sooner than the maker's maximum in heavy rain.
Natural Armor Animal & Rodent Repellent 128 oz
Best for: Rodents plus skunks, raccoons or deer
- ✓Covers about 1,000 sq ft, per the maker
- ✓Lasts up to 90 days, per the maker
- ✓Buyers like the scent
- −Sprayers fail, per buyers
- −Mixed effectiveness and poor value feedback
Specifications (3)
- Item Volume
- 128 fluid ounces
- Size
- 128 Fl Oz (Pack of 1)
- Number of Items
- 1
CONKAT Rodent Repellent Pouches: Best for Sheds and Trash Areas
CONKAT pouches are 8 packs of peppermint-scented balls for indoor and outdoor placement. The maker says they last 60 to 90 days and cover up to 120 square feet each.
- Buyers report less rodent activity around outdoor trash areas and equipment sheds.
- Setup takes under a minute, per buyers.
- Scent feedback is mixed, from fresh to very pungent.
- Like most peppermint products, it is an unreviewed minimum-risk product.
Choose it for sheds, covered trash enclosures and equipment storage, where the scent stays concentrated and rain does not reach it. In open ground, granules or a barrier do more.
CONKAT Rodent Repellent Pouches 8 Pack
Best for: Sheds and covered trash areas
- ✓Buyers report less activity around trash areas
- ✓Quick setup
- ✓60 to 90 days per pouch, per the maker
- −Mixed scent feedback, sometimes pungent
- −Unreviewed minimum-risk product
Specifications (4)
- Scent
- Mint
- Item Form
- Granule
- Number of Items
- 8
- Size
- 1 Ounce (Pack of 8)
- YARDGARD Hardware Cloth wins for: sealing vents, crawl spaces and decks for good
- Tomcat Repellents Rodent Repellent Granules wins for: soil and plantings around the foundation
- Tomcat Repellents Rodent Repellent Spray wins for: entry points while you seal them
- Natural Armor Animal and Rodent Repellent wins for: rodents and larger yard pests
- CONKAT Rodent Repellent Pouches wins for: sheds and covered trash areas
None of them works well in a yard that is still feeding and sheltering rodents, which is where to start.
How to Keep Rodents Away From the Outside of Your House
- Food: cover garbage, pick up fallen fruit and nuts, bring pet food in at night and use trays or baffles under bird feeders.
- Cover: clear woodpiles, lumber and clutter from against the house, store firewood off the ground and thin dense ground cover such as ivy.
- Climbing routes: cut back tree limbs that overhang the roof, which roof rats use to reach the attic.
- Openings: screen vents with 1/2-inch hardware cloth and seal gaps larger than 1/4 inch around pipes and wires.
- Repellents: apply granules or spray along the foundation and entry points after the cleanup, and keep to the reapplication schedule.
What Can You Put Down Outside to Keep Rats Away?
Nothing you scatter on the ground keeps rats away permanently. Granules and sprays make treated soil and surfaces less attractive for a few weeks, but nothing repels mice or rats immediately and for good, natural or not; peppermint and other oils fade outdoors within days to weeks.
What lasts is physical: hardware cloth over vents and under decks, gaps sealed with metal, and a yard with no food or cover left out. That is also the answer to getting rid of mice permanently outdoors. The best way to clear rodents already living outside your house is to remove their food and shelter, set covered snap traps along walls and burrows, and seal the openings once catches stop; the rodent repellents section covers what each product type can add.
Common Questions About Outdoor Rodent Repellents
Is outdoor rodent repellent safe for dogs?
Is outdoor rodent repellent safe for dogs?
Plant-oil repellents are generally labeled safe around pets when used as directed, but read each label for how long to keep pets off treated areas. Granules on soil can be eaten by curious dogs, so apply them where dogs rarely dig and water them in if the label allows.
Do outdoor ultrasonic rodent repellers work?
Do outdoor ultrasonic rodent repellers work?
There is little evidence they do. UC IPM notes ultrasonic sound is directional, does not reach behind objects and fades quickly with distance, and rodents get used to repeated sounds. Outdoors, plants, walls and wind weaken it further, so spend the money on hardware cloth and traps.
When is the best time of year to use outdoor repellents?
When is the best time of year to use outdoor repellents?
Late summer into fall, before nights turn cold. Mice and rats move toward buildings for shelter in autumn, so sealing openings and treating the foundation then heads off the seasonal push indoors. Keep up monthly treatments through the cold months if rodents keep testing the house.
Should I spray repellent on my garden plants?
Should I spray repellent on my garden plants?
Only if the label lists the plants or edible crops you want to treat. Many rodent repellents are meant for soil, foundations and entry points, not foliage or food. For gardens, fencing beds with hardware cloth and removing fallen produce work better.
Which One Should You Buy?
For most homes, start with YARDGARD hardware cloth over foundation vents, crawl-space openings and the gaps under decks and sheds. It is the one product here that keeps rats and mice out without reapplying, and it is what UC IPM recommends for screening openings.
Add Tomcat granules to plantings and mulch along the foundation, the Tomcat spray for entry points while sealing is under way, Natural Armor if you also deal with skunks or raccoons, and CONKAT pouches for sheds and covered trash areas. Clear food and cover first, or none of the scents will hold for long.
This weekend, walk around the house, list every vent and gap at ground level, and cover the biggest one first.
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