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Custom Magnetic Sign Information

Custom Magnetic Signs for Cars, Trucks, Vans, and Business Vehicles

Custom magnetic signs are an easy way to turn your car, truck, van, trailer, or service vehicle into removable business advertising. They are ideal for contractors, delivery drivers, mobile services, schools, fleets, real estate agents, security patrols, and small businesses that need professional vehicle signs without permanent decals.

At Wholesale Magnetic Signs, you can upload print-ready artwork, design online, request design help, or use our custom size calculator. Our magnetic signs are made from heavy-duty magnetic sheeting and are designed for clean, flat steel vehicle panels.

Important: Magnetic signs only stick to clean, flat steel surfaces. They will not stick to aluminum, fiberglass, plastic, composite panels, glass, carbon fiber, or body filler. Test your vehicle with a household magnet before ordering.

4 Easy Ways to Order Custom Magnetic Signs

Ordering custom magnetic signs should be simple. Choose the option that best fits your artwork, timeline, and comfort level.

Upload Print-Ready Artwork

Already have a finished design? Upload your artwork and order your magnetic signs quickly.

Upload your artwork

Design Online

Choose a standard size and customize your sign with our online design tool.

Design magnetic signs online

Let Us Design It

Need a professional layout? Our team can help create a clean, readable magnetic sign design.

Request design help

Need a Custom Size?

Use our price calculator to order custom dimensions by the inch.

Calculate custom size pricing


The best magnetic sign size depends on your vehicle, the available flat steel area, and how much information needs to be readable from a distance. For most business vehicles, simple layouts with large text work best.

Magnetic Sign Size Best For
12" x 6" Small bumper signs, tailgates, compact spaces, warning messages, and secondary vehicle signs.
18" x 12" Small car doors, compact vehicles, simple logos, phone numbers, and smaller business signs.
24" x 12" One of the most popular sizes for cars, trucks, vans, and business vehicle doors.
24" x 18" Larger truck doors, service vehicles, and designs that need more room for logos and contact information.
36" x 18" or larger Cargo vans, trailers, fleet vehicles, and large flat steel panels where extra visibility is needed.

Not sure what size you need? Measure the flat steel area where the magnet will go, then choose a size that does not cross trim, molding, door gaps, curves, handles, or body lines.


Will Magnetic Signs Stick to My Vehicle?

Magnetic signs only work on clean, flat steel surfaces. They do not stick to all vehicles. Many newer vehicles have aluminum, fiberglass, plastic, composite, or non-steel body panels, especially on doors, hoods, tailgates, and cargo areas.

Before ordering, test the exact area where the sign will be placed with a household magnet. If the magnet does not stick firmly, a magnetic sign will not work on that panel.

Quick test: If a household magnet sticks firmly to the exact vehicle panel, that area may be steel. If it does not stick, choose adhesive vinyl decals instead of magnetic signs.

For more help, visit our vehicle compatibility guide.


Reflective vs Standard Magnetic Signs

Standard magnetic signs are a great choice for everyday business advertising. Reflective magnetic signs are a smart upgrade when visibility matters in low light, parking lots, roadsides, security areas, school zones, delivery routes, or nighttime work.

Standard Magnetic Signs Reflective Magnetic Signs
Best for normal daytime business use. Better visibility when headlights or direct light hit the sign.
Good for contractors, service businesses, and everyday vehicle advertising. Good for security, delivery, frequent stops, roadside, and safety-related signs.
Usually lower cost than reflective material. Usually costs more, but adds low-light visibility.

Learn more about reflective magnetic signs.


Magnetic Signs vs Vinyl Decals

Magnetic signs and vinyl decals are both popular for business vehicles, but they are used in different situations. Magnetic signs are removable and reusable. Vinyl decals are better for permanent branding or vehicles that do not have steel panels.

Magnetic Signs Vinyl Decals
Removable and reusable. Designed for long-term or permanent placement.
Good for personal vehicles, shared vehicles, seasonal use, and temporary branding. Good for permanent fleet branding and non-steel vehicle panels.
Can be removed after work or transferred between compatible steel vehicles. Not intended to be removed and reused.
Requires clean, flat steel panels. Can be applied to many smooth surfaces, including non-steel panels.

Best Uses for Custom Magnetic Signs

Custom magnetic signs are useful for businesses and organizations that need professional vehicle identification without permanent graphics. They are especially helpful when a vehicle is used for both business and personal driving.

Popular industries for magnetic vehicle signs

Magnetic signs work well for HVAC companies, plumbers, electricians, landscapers, pest control companies, cleaning businesses, mobile detailers, delivery drivers, real estate agents, contractors, construction companies, security patrols, rural carriers, and school vehicles.


What Makes a Good Magnetic Sign?

A good magnetic sign should be easy to read, properly sized for the vehicle, and installed on the correct surface. The best designs are simple, high contrast, and focused on the most important information.

Readable Layout

Use large text, strong contrast, and simple wording. Your business name, service, phone number, and website should be easy to understand quickly.

Proper Material

Vehicle magnets should be made from material designed for outdoor vehicle use. Our vehicle magnets are made from heavy-duty magnetic sheeting.

Correct Placement

Place magnets only on flat steel panels. Avoid curves, trim, molding, door gaps, handles, rust, dents, and body lines.

Rounded Corners

Rounded corners help reduce edge lift and give the sign a cleaner, more finished appearance.


Installation and Care

Proper installation and regular care help magnetic signs perform better and last longer. Most magnet problems are caused by poor surface contact, dirt behind the magnet, incorrect placement, or leaving moisture trapped behind the sign.

How to install magnetic signs

Clean and dry both the vehicle surface and the back of the magnet. Place the magnet flat against the steel panel and make sure the entire magnet is in full contact with the vehicle. Do not slide the magnet across the paint.

Read our full magnetic sign installation guide.

How to care for magnetic signs

Remove magnetic signs regularly and clean both the sign and the vehicle surface with mild soap and water. Dry everything completely before reinstalling. Do not take magnetic signs through automatic car washes or pressure washing.

Read our care and cleaning guide for magnetic signs.


Helpful Magnetic Sign Resources

Use these guides to choose the right magnetic signs, install them correctly, and avoid common issues.


Custom Magnetic Sign FAQs

Do magnetic signs stick to aluminum vehicles?

No. Magnetic signs do not stick to aluminum. They only stick to clean, flat steel surfaces. If your vehicle door, tailgate, or panel is aluminum, choose adhesive vinyl decals instead.

What size magnetic sign should I order?

A 24" x 12" magnetic sign is one of the most popular sizes for cars, trucks, and vans. Smaller vehicles may need 18" x 12", while larger doors, cargo vans, and trailers may need 24" x 18", 36" x 18", or custom sizes.

Do magnetic signs damage paint?

Magnetic signs should not damage properly cured factory paint when installed and maintained correctly. Damage risk increases when dirt, moisture, wax, or road debris is trapped between the magnet and the vehicle.

Can magnetic signs go through a car wash?

No. Remove magnetic signs before automatic car washes, pressure washing, or high-pressure rinsing. Wash and dry the vehicle and magnet separately before reinstalling.

How long do magnetic signs last?

With proper use, cleaning, and storage, magnetic signs can last several years. Outdoor life depends on sun exposure, weather, road conditions, cleaning habits, and how often the signs are removed and maintained.

Are reflective magnetic signs worth it?

Reflective magnetic signs are worth considering if your vehicle is used at night, early in the morning, near traffic, in parking lots, on delivery routes, or for safety-related work.

Will magnetic signs fly off at highway speeds?

Magnetic signs are designed to stay in place when properly installed on clean, flat steel panels. Fly-offs are usually caused by dirty surfaces, poor placement, curved panels, aluminum or non-steel doors, door gaps, molding, or lack of full surface contact.


Ready to Order Custom Magnetic Signs?

Whether you need truck magnets, van signs, business vehicle magnets, reflective magnetic signs, custom sizes, or design help, our team can help you choose the right option.

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