Rental brands have explicit prohibited-item lists in their contracts. Most people sign without reading. If something on the prohibited list damages the truck or causes an accident, your rental insurance is void and you’re personally liable.
Beyond the strict prohibitions, there’s a category of “technically allowed but you shouldn’t” items that crews see crushed, melted, or broken constantly. This page covers both.
Strictly prohibited (will void your insurance)
These are common to U-Haul, Penske, and Budget contracts:
Hazardous / flammable
- Gasoline, kerosene, propane, lighter fluid. Empty your lawn mower, weed-eater, and any grill propane tanks before loading. Most rental locations have a “fuel siphoning” service if you ask.
- Aerosol cans of any kind. Spray paint, hair spray, WD-40, bug spray, sunscreen spray. In hot trucks these become pressurized bombs.
- Cleaning chemicals: bleach, ammonia, drain cleaner, pool chemicals.
- Charcoal lighter fluid, fireplace logs (treated), kindling fuel.
- Fireworks (in any state).
- Matches, lighters (more than a personal use amount).
Explosive / weapons-adjacent
- Ammunition. Most contracts prohibit it even unloaded.
- Black powder, gunpowder, primers (for reloaders).
- Compressed gas cylinders — oxygen tanks, scuba tanks, acetylene, propane bigger than 16 oz.
Live items
- Pets. Cats, dogs, fish, birds, reptiles. They go in your car with the AC on, not in the cargo box.
- Houseplants. Technically allowed but most contracts say “we’re not responsible for damage to plants.” Plants die in hot/cold/dark trucks anyway. See the moving-with-pets-and-plants section below.
- Food perishables. Frozen and refrigerated food spoils in transit. Pack non-perishable pantry items only.
Other
- Cash, jewelry, important documents over a threshold value ($1,000 typical). Not strictly prohibited but not covered by rental insurance. Keep in your car.
- Medical equipment like oxygen concentrators (compressed gas).
- Lithium-ion batteries in bulk (e-bike, e-scooter spare packs). Tools and laptops fine; spare e-bike batteries technically not.
”Technically allowed but really don’t” list
The contract doesn’t prohibit these but they break, melt, or ruin other things:
- Candles in summer. They melt into puddles and stain fabric furniture. Pack them with a folded towel as a base; ideally ride them in your car.
- Crayons, oil paints, art supplies. Same melting risk.
- TVs flat on the bed (LCD/OLED). The panel flexes and cracks. Stand TVs vertically in original boxes or pad them thickly.
- Computers. Hard drives are sensitive to bumps; SSDs less so. Either way, ride your primary work laptop in the car.
- Wood furniture in winter cold. Sub-freezing transit dries wood out and cracks finishes. Either run the heat in the truck the whole way (the cab AC and the cargo box are separate; cargo gets COLD), or wait for a warmer day.
- Refrigerators that haven’t been defrosted. Water from thawing ice damages the truck floor and stains anything below. Defrost 48 hours before move day.
- Mattresses without covers. They absorb anything that drips in transit. $10 mattress bags from any U-Haul location.
- Picture frames stacked flat. Glass cracks. Stand them on edge between mattresses or padding.
- Liquor bottles loose. They roll and shatter. Pack in original cardboard cases or with a foam divider.
- Mirrors not wrapped. Wrap in pads and stand on edge.
What about cars and motorcycles?
- Cars: U-Haul, Penske, and Budget all rent auto transports (tow dolly or full car carrier) separately from the truck. This is the right way to move a vehicle behind a moving truck. Don’t drive the truck towing the car if you’ve never towed before — practice in a parking lot first.
- Motorcycles: They can ride in the cargo box if strapped properly. Drain the gas first (or run it to fumes), tie down through frame points not handlebars or fenders, use chocks at the front and back wheels.
Pets and plants — what to do instead
Pets ride with you in the car. Stops every 2-3 hours for water, bathroom, and decompression. If the move is more than 8 hours by car, plan an overnight stop at a pet-friendly hotel. For multi-day cross-country moves, consider professional pet transport.
Plants ride in the car too, if you can fit them. They need light and temperature stability. For long-distance moves, sometimes the right call is to give plants to friends/neighbors and start fresh.
When in doubt
Read the rental contract — it’s actually short, often one page. The prohibited items list is in the first half. Or call your pickup location ahead and ask about specific items.
If a crew sees you trying to load something prohibited, they’ll tell you on the spot — they don’t want their reputation on a fire either. Listen to them.