KEEP MICE OUT OF YOUR CAR, RV, OR VAN

Box-Kat is a physical mouse barrier designed to stop rodents before they reach your vehicle

With a non-toxic design built to help block mice from climbing, chewing, or sneaking their way inside, Box-Kat offers a cleaner, smarter way to help prevent chewed wiring and costly rodent damage before it starts.

SHOP YOUR VEHICLE KIT
White RV parked outdoors inside a box-kat mouse barrier

FIND THE RIGHT BOX-KAT FOR YOUR SETUP

Choose from three vehicle kit options designed for everything from personal cars to vans and larger RVs

A black vintage car displayed inside a Box-Kat mouse barrier with exposed wooden ceiling beams and a concrete floor.

Mouse Barrier for Cars, SUVs, & Personal Vehicles

$249.00
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Sprinter van parked outdoors with Box-Kat mouse barrier

Mouse Barrier for Campers & Vans

$374.00
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Large RV inside a Box-Kat mouse barrier

Mouse Barrier for RVs & Motorhomes

$499.00
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HOW DOES THE BOX-KAT MOUSE BARRIER WORK?

Flexible connectors. A sealed perimeter. Smarter mouse prevention.

Box-Kat forms a physical barrier around your parked vehicle to help stop mice before they can get underneath and cause damage. Its patented flex connectors help the barrier follow slight changes in slope on concrete, asphalt, gravel, and dirt, and a little ground prep before setup helps close the rest. Instead of relying on traps, poison, or temporary deterrents, Box-Kat offers a cleaner, longer-term way to help protect against chewed wiring, nesting, and rodent mess.

LEARN MORE ABOUT BOX-KAT

MICE PREVENTION, NOT PERSUASION

Traditional Deterrents Try to Repel Mice. Box-Kat Stops Them in Their Tracks.

Many Box-Kat customers find us after trying peppermint oil, ultrasonic devices, traps, poison, or DIY remedies that only offer temporary relief. The problem is that most traditional deterrents are designed to repel mice, not physically stop them from reaching your vehicle. Box-Kat takes a different approach by forming a barrier around the perimeter, helping block access before chewing, nesting, and costly damage can begin.

Why Box-Kat Works When Traditional Deterrents Fall Short

Swipe to scroll and compare options.

Feature Box-Kat Sprays & Scents Audio Deterrents Traps Poison
Physical barrier around the vehicle Yes No No No No
Helps block access before damage starts Yes Limited Limited No No
Safe, non-toxic solution Yes Usually Yes Yes No
Useful for long-term storage Yes Limited Limited Limited Limited
No ongoing reapplication, power source, or rebaiting Yes No No No No
Cleaner, lower-mess solution Yes Usually Usually Limited No

Traditional deterrents can still play a supporting role, but Box-Kat is designed to address the access problem directly with a physical barrier around the vehicle itself.

Mouse chewing on car engine wires

RODENT DAMAGE CAUSES VEHICLE OWNERS MILLIONS EVERY YEAR

From chewed wiring and shredded upholstery to contaminated HVAC systems, droppings, and nesting debris, even a single mouse can do serious damage to a parked vehicle. Once labor, diagnostics, cleanup, and replacement parts are involved, repair costs can add up fast.

TRY THE COST CALCULATOR
Two cars inside of Box-Kat mouse barriers in driveway
I'm super grateful for the Box-Kat as we had an active problem that we couldn't stop and was causing lots of damage, and we needed a solution right away.

Charles B.

Stanford, CA

Honda CRV in garage with Box-Kat
It simply works. Worth every penny! Our family now has two of them. They work perfectly and should last a lifetime.

Lorri S.

Port Byron, IL

Caper van parked outdoors with a Box-Kat mouse barrier
Folks who know what it takes to protect valuable assets will look for your solution!! The ONLY way to keep rodents out is to Box them out!!

Kelvin N.

San Diego, CA

Sprinter van parked outdoors with Box-Kat mouse barrier
I still highly recommend the Box-Kat rodent barrier – it really does work and keeps the rodents out!

Christopher C.

Santa Cruz, CA

Hyundai Palisade parked in garage with Box-Kat mouse barrier
Convenient, easy to use and efficient! It definitely works as advertised! Highly recommend.

Jeff M.

Mountain Iron, MN

WHO IS THE BOX-KAT FOR?

The Box-Kat is for vehicle owners who are tired of the stress, mess, and expense that come with rodent damage.

  • Anyone who has found mouse droppings, nesting debris, or lingering odors in a parked vehicle
  • RV, van, and classic car owners who store their vehicles for weeks or months at a time
  • People who dread turning the key after storage and wondering what mice may have damaged
  • Anyone who has dealt with chewed wires, cleanup, contamination, or costly repair bills
  • People who are done relying on traps, poisons, oils, and other temporary deterrents
  • Vehicle owners who want a cleaner, safer, more reliable way to help prevent damage before it starts

Whether you’re protecting a family RV, preserving a dream car, or safeguarding your everyday vehicle, Box-Kat offers a smarter way to help keep rodents out.

FIND YOUR BOX-KAT MOUSE BARRIER
Box-Kat inventor Tom Sharp

Frequently Asked Questions

Find answers to common questions about our products and services.

Mice are always on the hunt for food or a cozy place to nest. The Box-Kat’s durable plastic construction is neither edible nor easily chewable, deterring mice and other small rodents from trying to break through. When mice encounter the Box-Kat, they instinctively search for openings, a way over, or a path underneath. Finding none, they quickly move on in search of easier targets.

During testing, we placed 50 mice inside a Box-Kat enclosure. Not only did they fail to chew through the panels, but after 90 minutes, 80 percent of the mice gave up, piled into a corner, and went to sleep. The Box-Kat is proven to be a simple, humane solution to mice intrusion.

The Box-Kat stands two inches taller than the highest jump of a house mouse, making it impossible for them to leap over. Along the ground, the patented flex connectors help the barrier follow the surface and minimize gaps underneath, and a little surface prep before setup helps close the rest.

Box-Kat is specifically designed to thwart house mice — the most frequent cause of vehicle rodent damage — and is extremely effective. Its height and panel texture are engineered to stop them from leaping over, burrowing under, climbing up, or chewing through.

It may also deter larger rodents such as rats or squirrels, but effectiveness can vary depending on their size and behavior.

For best results, make sure your setup is as level as possible and panels are securely clipped together.

The Box-Kat's patented black flex connectors let the barrier adjust to slight changes in slope, cracks, and dips, which is a real advantage over a rigid wooden or metal fence. 

It won't mold itself to every surface on its own, so the best results come from a little prep: clear tall grass and debris, rake gravel or dirt as smooth as you reasonably can, and place the flex connectors over the biggest changes in slope. 

On gravel or dirt, plan on a layer of galvanized mesh and a few stakes as well. Our Assembly Instructions page walks through it.

Yes! Box-Kat is built for indoor or outdoor use, but the elements can be a factor.

To keep your barrier securely in place, we recommend using an anchoring system such as:

  • Water jugs, sandbags, or cinder blocks for hard surfaces
  • Garden stakes for soil or grass setups

Set weights down gently on the inside half of the L-shaped braces rather than dropping them. The acrylic braces are sturdy, but a dropped cinder block can crack them.

Make sure the ground is as flat as possible and clear of tall grass or debris. On gravel or dirt, plan on a bit more prep: rake the area, add a layer of galvanized mesh, and stake the braces if needed. Proper prep = better performance.

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