• A black vintage car displayed inside a Box-Kat mouse barrier with exposed wooden ceiling beams and a concrete floor.
  • Box-Kat mouse barrier around pickup truck on gravel lot
  • Two cars inside of Box-Kat mouse barriers in driveway
  • Box-Kat mouse barrier parts included
1 7

Box-Kat

Mouse Barrier for Cars, SUVs, & Personal Vehicles

Mouse Barrier for Cars, SUVs, & Personal Vehicles

A reusable, non-toxic perimeter that physically blocks mice from your parked vehicle. Sets up in about 30 minutes.

 

  • 10’ × 15’ enclosed perimeter — ideal for most cars, SUVs, pickups, and small trailers
  • 14" tall — too high for house mice to jump
  • Patented flex connectors adjust to slight slopes, dips, & cracked concrete (gravel and dirt setups need a little extra prep)
  • No sprays, traps, or poison. Set it up once for the season and leave it in place
$249.00 USD
$249.00 USD
Sale Sold out
Shipping calculated at checkout.

Ordering 4 or more kits? Request a volume quote.
  • Surrounds the Vehicle
  • Adjusts to the Ground
  • Blocks Mice Access
View full details

Not sure this is the right kit?

Choose the size that matches your vehicle. Most cars, SUVs, and trucks fit the Personal Vehicles kit.

You're here
Cars, SUVs & Trucks 10' × 15' · $249
Campers & Vans 10' × 25' · $374
RVs & Motorhomes 10' × 40' · $499
Expansion Kit Add more coverage

NON TOXIC

Safe around kids and pets

14" TALL

Higher than mice can jump

INDOOR + OUTDOOR

Garage, driveway, gravel pad

30-MIN SETUP

No tools required

WHAT'S IN THE BOX? 

  • 10 white panels (5 ft. each) to form the 10' x 15' enclosure
  • Patented black flex connectors help the barrier follow uneven ground
  • Push-in fender clips, for a strong, long-term connection
  • Wing-nut quick-access screws for daily drivers or frequent access
  • Acrylic braces for added stability
  • Step-by-step instructions

Anchoring (sandbags, stakes) sold separately. Gravel and dirt setups may also call for galvanized mesh.

FULL ASSEMBLY INSTRUCTIONS

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.

Mice failing to climb over Box-Kat panel walls

PROVEN IN TESTING

We put 50 mice inside a Box-Kat and watched what happened. 

None of them chewed through, climbed over, or squeezed under the Box-Kat. After 90 minutes, 80 percent of the mice had given up, piled into a corner, and gone to sleep. The 14" wall is taller than a house mouse can jump. The patented panel material isn't edible. The flex panels seal tight to the ground.

It's not a deterrent. It's a barrier.

50
mice placed inside a sealed Box-Kat enclosure
0
chewed through, climbed over, or squeezed under
80%
gave up and went to sleep within 90 minutes
$1,000s
saved in potential rodent damage for our customers

Customers are saying

$249 once, or $1,000+ in repairs?

A single chewed wiring harness can run several thousand dollars to diagnose, reach, and repair. The Box-Kat is a one-time cost that pays for itself the first time it prevents a single rodent incident.

TRY OUR RODENT DAMAGE COST CALCULATOR

After 25 years of fighting mice, our founder built the solution himself.

Tom Sharp designed the first Box-Kat prototype in 2017 after losing the battle with rodent damage one too many times. Today, Box-Kat is the only patented mouse barrier of its kind — built, tested, and refined with seven years of customer feedback.

LEARN MORE
Box-Kat inventor Tom Sharp
FREQUENTLY ASKED QUESTIONS
Can mice chew through the Box-Kat?
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.
Will mice jump over or go under the Box-Kat?
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 site prep before setup helps close the rest.
Does the Box-Kat protect against other rodents?
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.
Does the Box-Kat work on uneven surfaces?
Yes, within reason. The 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.
Can the Box-Kat be used outdoors?
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, grass, or gravel setups
Set weights down gently on the inside half of the L-shaped braces. 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 (raking, a layer of galvanized mesh, and stakes) before the barrier goes up. Proper prep = better performance.

(See our Assembly Instructions for a full setup guide.)
How do you set up the Box-Kat?
The Box-Kat is designed for simple, tool-free assembly. The white panels and black flex connectors join with push-in fender clips, which make a strong, secure connection that's built to stay in place.

Be sure to view our Assembly Instructions page.
Does the Box-Kat have to be set up as a perfect rectangle?
No. The dimensions we list describe the general shape and fit. The barrier can just as easily be set up in an oval-like shape, borrowing a few inches from the length to add to the width, as long as the perimeter stays closed. Use the flex connectors to make the turns.

We don't recommend reverse-bending the panels or bending them along new lines to change the shape.
How do I store the Box-Kat when it's not in use?
The Box-Kat is designed for long-term setup. Its push-in fender clips hold securely over time, which also makes them difficult to remove and reinstall repeatedly. For seasonal storage, most customers remove the clips at a few connection points, leave the panels partially assembled in 5-foot sections, and stack them flat.

If you'd like to take your kit apart often, substitute wing-nut screws for the fender clips at the connection points you'll open, the same way our daily-driver access point works.
Will the Box-Kat withstand weather conditions?
The Box-Kat is crafted from high-quality, durable plastic materials, ensuring reliable performance and long-lasting protection. However, like any product, it may experience normal wear and tear over time. Exposure to extreme temperature fluctuations, UV rays, moisture, and wind can gradually impact its condition. Regular care and proper setup will help maximize its lifespan and effectiveness.
Can I get replacement or extra parts?
Yes. Email us at hello@box-kat.com with what you need and we'll let you know what's available and what it costs. Extra fender clips are also easy to find at any home improvement store or online.

For more coverage, the 10-foot Expansion Kit adds two panels along with connectors, clips, and braces.
What is the return policy?
We accept returns within 30 days of delivery, provided the product is unopened or in like-new condition. To be eligible, the item must be undamaged and returned in its original packaging.

More information can be found on our Shipping & Returns page.
Do you ship outside the U.S.?
We ship to both the United States and Canada. For Canadian orders, any import duties or fees are the responsibility of the customer. If you're located outside the U.S. and Canada and would like to order, reach out to us directly and we'll do our best to help.