Box-Kat car barrier around ElCamino in garage

IT'S A WALL, FOR MICE

Box-Kat doesn’t just deter mice — it stops them in their tracks.

Defend your car or RV with the only proven, non-toxic design that's built to block mice from climbing, chewing, or burrowing their way into your vehicle. No poison. No traps. Just a clean barrier that keeps rodents from ever getting inside.

Don't wait until your caught paying for expensive rodent repairs – grab your Box-Kat today!

SHOP OUR VEHICLE KITS

WHAT IS THE BOX-KAT MOUSE BARRIER?

NO. 1 MOUSE BARRIER FOR CARS, VANS, RVs, AND MORE

The Box-Kat is the easiest and most reliable way to protect your vehicle from mouse-related damage. With its upgraded flex-panel design and improved stability system, it forms a foolproof barrier that keeps mice and other small rodents from burrowing into the underside of your car, truck, RV, or trailer. Built to handle uneven surfaces and tough conditions, the Box-Kat goes up quickly, stays in place, and delivers long-lasting protection. No poisons, no traps — just simple, effective peace of mind. Never worry about chewed wiring or mouse droppings again.

WHO IS BOX-KAT FOR?

Box-Kat is for anyone who knows the frustration of finding mouse droppings in their vehicle and the lingering smell that never goes away. It’s for the RV, van, and classic car owners who store their vehicles for months, dreading the moment they turn the key and nothing happens. It’s for those who’ve battled with insurance companies over chewed wires, only to shoulder the burden of the costly repairs.

Every year, thousands of vehicle owners face mouse-related damage, leading to expensive repairs, engine failures, and in worst cases, fires or accidents that result in a total loss of their investment.

Unlike messy traps, toxic poisons, smelly oils, or other unreliable deterrents, the Box-Kat is simple, effective, and safe. Its patented mouse barrier delivers the ultimate protection without any of the hassle.

Whether you’re protecting your family RV, preserving your dream car, or securing your everyday vehicle, the Box-Kat is your trusted solution.

TESTIMONIALS

  • Christopher (crimdom.net)

    "I still highly recommend the BoxKat rodent barrier – it really does work and keeps the rodents out!"

    Read More 

  • RVtravel

    "This is one of those ideas where it’s a very simple solution to a common problem. And it’s probably one where I’m sure there are more than a few folks asking, “Why didn’t I think of that?” Well, Tom Sharp did — and we RVers are the beneficiaries."

    Read More 

  • Laura V.

    "Just wanted to give a shout out to Box-Kat, design much improved! Very sturdy and steady and ready to keep the mice OUT!!!!! This is a daily driver and as you can see from the pictures I can get in and out of my car easily."

    Grass Valley, Oregon
Black classic car parked inside BOX-KAT mouse barrier inside a garage

ADAPTS TO UNEVEN SURFACES

FLEX-PANEL TECHNOLOGY

Box-Kat’s patented flex-panel technology doesn’t just form a barrier — it seals off gaps other barriers miss. Designed for garages, gravel, dirt, and more, our panels contour to the ground to block even the smallest entry points. Standing 14 inches tall, these durable plastic panels are also engineered to stop mice from climbing or leaping over, giving your vehicle full 360° protection.

White RV parked outdoors inside a box-kat mouse barrier

INDOOR & OUTDOOR USE

STORE YOUR VEHICLE WITH CONFIDENCE

Whether you're safeguarding a golf cart or a 45-foot motorhome, the Box-Kat’s versatile design scales effortlessly to provide complete coverage. Perfect for personal cars, family RVs, or any vehicle stored for extended periods, the Box-Kat ensures your investment stays protected, no matter the size.

With proper bracing, the Box-Kat is effective even in outdoor weather conditions. Learn more on our assembly page!

Vintage el camino parked inside a Box-Kat mouse barrier inside a garage

EASIER IN-AND-OUT ACCESS FOR

DAILY DRIVERS

A set of wing-nut screws is included with every kit, giving daily drivers a quick-access point. Just loosen the designated panel connection to open and close your setup with ease — perfect for anyone who needs to come and go regularly.

Mice failing to climb over Box-Kat panel walls

NATURAL RODENT PREVENTION

HARMLESS, NON-TOXIC MOUSE DETERRENT

Box-Kat creates a simple but impenetrable line mice can’t climb, chew, or burrow through. No toxins, no killing, no harmful side effects — just proven prevention that keeps your vehicle safe and rodents where they belong: outside.

By stopping infestations before they start, Box-Kat protects both your vehicle and the environment in a way no spray, trap, or bait ever could.

Box-Kat Mouse Barrier for home

Protect more than your car

RODENT PROOF YOUR HOME & STORAGE

Whether for personal or professional use, the Box-Kat’s durable components and simple setup makes it a reliable solution for safeguarding more than just your vehicle. Perfect for your home, porch, garage, or shed, the Box-Kat ensures your property remains safe and pest-free.

Business owners can also add an invaluable layer of protection to their inventory and equipment by using the Box-Kat around storage units, loading docks, warehouses, and more.

SECURE YOUR KIT TODAY

SHOP NOW

FREQUENTLY ASKED QUESTIONS

How does it work?

Unlike traps or poisons that only deal with rodents after damage is done, Box-Kat works as a physical barrier to keep them out completely.

Its patented flex panels mold to uneven ground and prevent burrowing. Standing 14 inches tall, the Box-Kat is designed to stop mice from jumping or climbing over — providing 360° protection from the most common vehicle-invading rodents.

No chemicals. No cleanup. Just peace of mind.

Is it effective on all 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.

Can I use the Box-Kat outside?

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

Make sure the ground is as flat as possible and clear of tall grass or debris. Proper prep = better performance.

(See our Assembly Instructions for a full setup guide.)

Will it work on uneven or cracked surfaces?

Yes — that’s exactly what it’s designed for.

Thanks to our patented flex-panel technology, Box-Kat 2.0 can mold to the shape of your driveway, garage, or parking pad — including areas with cracks, dips, gravel, or slight slopes.

The panels flex and settle naturally into surface contours, forming a continuous barrier that keeps rodents out, even when the ground isn’t perfectly flat.

Just make sure to clear any tall grass or large debris, and anchor as needed for outdoor setups.

Is the Box-Kat adjustable?

Each Box-Kat is constructed of 5-foot white panels attached by flexible black connectors. These can absolutely be manipulated and shaped to best suit your vehicle and storage situation.

Can I drive over the Box-Kat?

No. For repeated daily use we have supplied a pair of screws and wing nuts for ease of access.

Check out our Instructions Page for more information.

How long will my Box-Kat last?

The Box-Kat is crafted from high-quality 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 season after season.

Can I order individual parts?

Unfortunately, we are not currently able to sell individual panels or extension kits.

Is there a warranty on the Box-Kat?

With proper care and limited exposure to extreme heat or UV, the Box-Kat is designed to last between 5 to 10 years. For added assurance, we offer a materials warranty of five years for indoor use and two years for outdoor use.

While the Box-Kat delivers highly effective mouse protection, its performance relies on proper setup and routine maintenance. External factors such as wind, pets, or children can disturb the barrier, so occasional inspections are recommended to ensure it remains secure. If wind gusts reach 40mph, extra precautions anchoring the Box-Kat — including taking it down — may be necessary. A flying Box-Kat may not be useful again and can damage vehicles.

With a little vigilance, the Box-Kat offers reliable, long-lasting protection for your vehicle and property.

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.

Return shipping costs are the responsibility of the customer. Refunds will be issued once the item has been received and inspected.