Custom car magnets are flexible magnetic signs printed with your logo and contact details that stick to flat steel vehicle panels and come off cleanly. They suit employee-owned cars, mixed fleets and seasonal campaigns where branding needs to move with the driver or the season. They work when the material, size and panel fit are right, and fail when any of those is guessed.
Table of Contents
- When are custom car magnets the right choice?
- Which car magnet thickness should you choose?
- What size and shape should a car magnet be?
- How do you design a car magnet people can read?
- How do you install and care for car magnets?
- Car magnets vs decals vs wraps: which is better?
- Custom car magnet FAQs
When are custom car magnets the right choice?
Car magnets are the right choice when the vehicle, the driver or the message may change. A service company adding temporary vans, a real estate team whose agents drive their own SUVs and a school running a six-week fundraiser all need branding that is not permanent.
- Employee-owned vehicles: drivers accept removable branding more readily than adhesive.
- Mixed and leased fleets: one set moves between qualifying vehicles.
- Seasonal or pop-up campaigns: swap the message without removal work.
- Field sales and route-based service: branding during work hours, a neutral car afterward.
Judge them by cost per month of usable exposure rather than unit price, since one set can cover several campaign windows. Put the same offer, phone number or QR destination on your magnets and your other business branding products so the campaign stays consistent.
Quoting car magnets
Tell us the vehicles, the panel size you want to cover, the quantity and your artwork, and we will quote magnet options that fit those surfaces. Every quote includes a free virtual proof, and nothing goes to production until you approve it in writing.
Reply within 24 business hours · no order minimum — per-item minimums typically start around 100–250 pieces · setup charge waived above $500 in product · artwork kept on file two years, so an exact reorder carries no new setup charge
Get a quote on car magnets or browse magnets · call 1.888.452.0027, Mon–Fri 9–6 ET
Which car magnet thickness should you choose?
A 30 mil magnet is the usual choice for business vehicles, while 60 mil holds harder for tougher conditions but bends less on curved panels. Thicker is only better if the panel is flat enough to take it.
- 30 mil: flexible enough to sit flat on most steel doors; fits city routes and service fleets.
- 60 mil: stronger hold for harsher routes, but only where the panel shape supports it.
- Thinner material: a gamble once speed, vibration and weather are part of the job.
Most early failures come from four causes:
- Wrong surface: plastic, aluminum and fiberglass panels will not hold a magnet.
- No UV protection: unprotected print fades in direct sun.
- Poor panel fit: crossing trim or body lines traps air, and lift starts there.
- Sharp corners: rounded corners catch less wind and peel less.
Check the panel before you check anything else. Sizing a magnet to the door in the mockup instead of the door on the truck is how perfectly good artwork ends up unusable.
Derek Capo, owner, CustomMark
What size and shape should a car magnet be?
Size the magnet to the flat steel area on the actual door, not to the vehicle class. Sculpted panels, molding and trim often shrink the usable space well below what the door looks like.
Smaller cars need a smaller rectangle that clears trim; SUVs and pickups can take a larger one that reads from across a parking lot. A custom car sign magnet covers rectangle orders, and a circle car sign magnet suits school spirit and simple logos.
- Rectangles: best for logos, phone numbers and web addresses.
- Circles and ovals: school spirit, fundraising and simple marks.
- Ribbons: cause campaigns.
- Rounded corners: treat them as standard; they reduce edge lift.
For mixed fleets, choose a format that works acceptably on every vehicle rather than perfectly on only one model.
How do you design a car magnet people can read?
Show the company name, the core service and one contact path in bold, high-contrast type. A car magnet gets a few seconds of attention, so anything that does not read at a glance should go.
- Brand first: name or logo where the eye lands.
- Service second: what you do, in plain words.
- One action: phone number, short URL or QR code, not all three.
- Clean spacing: empty space improves readability.
Avoid script fonts, thin letters and long service lists. Add a QR code only if the vehicle spends time parked at job sites, events or open houses, the code has clear space around it, and the landing page is mobile-friendly and matches the message.
If the layout was approved on a screen at arm’s length and cannot be understood at a glance, it is serving the mockup, not the vehicle.
How do you install and care for car magnets?
Apply the magnet to a clean, dry, flat steel panel so it sits flush with no air pockets, then remove and clean it regularly. Trapped dirt and moisture cause most paint and adhesion problems.
- Wash and dry the panel.
- Wipe the back of the magnet.
- Check full contact edge to edge.
- Reposition right away if you see bubbling or lift.
- Remove and clean regularly: wipe both the magnet and the panel.
- Store flat: never curl it into a trunk corner.
- Inspect the edges: catch dirt and early curling.
- Clean faster in winter: road salt and grime need quick attention.
If you issue magnets to field staff, include these care steps in the rollout.
Car magnets vs decals vs wraps: which is better?
Choose magnets when the vehicle assignment or message may change, and decals or wraps when a company-owned vehicle will carry the same branding for years. Ownership, message changes, panel material and installation labor decide it.
| Option | Best for | Main advantage | Main limitation |
|---|---|---|---|
| Car magnets | Temporary or shared-use branding | Removable, reusable, easy to swap | Needs suitable steel panels and regular care |
| Vinyl decals | Long-term identification on one vehicle | Cleaner, more permanent look | Not reusable or easy to reposition |
| Vehicle wraps | Full-fleet or high-visibility vehicles | Maximum coverage, works on curves and non-steel surfaces | Highest cost, more downtime, professional install |
Many newer vehicles lack enough flat steel for magnets, which pushes them toward decals or wraps. For smaller fixed marks, see our guide to custom bumper stickers. To price a removable option against the life of your campaign, request a custom car magnet quote.
Custom car magnet FAQs
Will car magnets fly off on the highway?
They can if the setup is wrong. Wind pressure rises sharply with speed, so highway use depends on full flat contact with a steel panel, no air pockets and rounded edges, not just on thickness.
Do car magnets work on every vehicle?
No, only on steel panels. Many newer vehicles use aluminum or plastic in places that look magnetic, so test the exact spot with a household magnet before ordering.
Can car magnets damage paint?
Not when applied to a clean surface and removed regularly for cleaning. Damage usually comes from trapped grit, moisture or dragging the magnet off; ask first if the paint is fresh or in poor condition.
How should a business order magnets for a mixed fleet?
Measure the flat steel area on each vehicle type and group vehicles into workable size categories. Ask for proofs that reflect each vehicle class rather than one generic mockup.
Ready to price it? Send us the door panel you are sizing to and its dimensions, the quantity, your in-hands date and your artwork file, and we’ll come back with real pricing. Start a quote or call 1.888.452.0027.