Car magnets vs vehicle wraps: which one suits your work vehicle?

If you drive to jobs, your vehicle is already a sign. The question is what goes on it. Most contractors, delivery drivers and small service businesses end up choosing between two things: a car magnet that comes off when you want it to, or a wrap or vinyl graphic that is applied to the body and stays there until it is removed.

Both can carry your name, what you do and how to reach you. They differ in how they hold on, which surfaces they need, how much of the vehicle they can cover and how you look after them. This guide walks through each point, using what magnet makers, film makers such as 3M and Avery Dennison, sign researchers and Ontario’s Highway Traffic Act actually say.

How each one works

Car magnets

A car magnet is a printed sheet of flexible magnet. It holds on by magnetic pull alone, so there is no adhesive and nothing to peel. You place it on the door, drive, and take it off when the work day ends. Our car magnets are 30 mil (0.030 in) vehicle magnet, UV printed with an outdoor protective laminate in a smooth gloss finish. The corners are rounded, which helps stop the edges lifting in the wind at speed, and the catalogue lists the magnet as tested up to 120 km/h on clean vehicle steel.

Standard sizes are 12 × 24 in (a typical truck door), 10 × 20 in (vans and compact cars) and 18 × 24 in (a larger commercial door), and custom sizes are available. Because one magnet moves easily, you can switch it between work vehicles or take it off for personal driving.

Wraps and vinyl graphics

A wrap is printed self-adhesive film. It is applied to the body panel by panel, worked around curves with heat, and trimmed at the edges. Unlike a magnet, it does not care what the panel is made of, as long as the surface is suitable for the film. 3M’s Print Wrap Film IJ180mC, for example, lists aluminum, ABS plastic, chrome, glass and paint among its substrates.

Wraps range from a few graphics on the doors to the whole vehicle. Our vehicle wraps cover cars, vans, trucks and trailers, from a full wrap down to door panels and small graphics, and the quote covers design, print and install.

Will a magnet stick to your vehicle?

A magnet only works on steel. Vistaprint’s car door magnet terms state plainly that aluminum, wood and fibreglass will not work as a surface, and Magnum Magnetics, which makes flexible magnet sheeting, says non-metallic, aluminum and plastic surfaces will not hold a magnet properly.

That rules out some popular work vehicles. A well-known example is the Ford F-150: since the 2015 model, its body has been an aluminum alloy on a steel frame, as Government Fleet reported from Ford’s launch details. A steel frame underneath does not help, because the magnet sits on the body panel.

Steel alone is not enough. The magnet must also lie flat. The sellers and makers we checked all say the same thing in different words:

• Flat or only gently curved panels. Vistaprint warns that curved edges can make the magnet fall off; Sticker Mule says to avoid dents, deep curves and heavily contoured panels.
• Nothing raised underneath. Keep clear of mouldings, pinstripes, decals and other raised parts, and of concave areas, lights, reflectors and air intakes (Vistaprint). Build-A-Sign adds ridges, trim and rust spots.
• Not over a wrap or decal. Sticker Mule says not to put a magnet on top of decals or vinyl wraps.
• Not on the roof or hood. Vistaprint says not to use horizontal surfaces such as roofs, and Build-A-Sign says to avoid horizontal panels in direct sun, such as hoods.
• Not on fresh paint or wax. Magnum and Vistaprint both give the same approximate curing times before a magnet goes on: 90 days for paint, 60 days for clear coat and 2 days for wax.

If your vehicle fails any of these, a magnet is the wrong product, not a smaller version of the right one. That is where vinyl comes in: our catalogue’s own advice for aluminum doors is to choose a vinyl graphic instead, and the vehicle wraps listing includes door panels and small graphics as well as full wraps.

Looking after a car magnet

The main risk is what gets trapped underneath it. Sticker Mule says flexible magnets generally do not harm paint when used correctly, and that damage usually comes from dirt, moisture or heat trapped under the sheet. Magnum warns that a vehicle sign left on too long can cause permanent damage.

How often to take it off is where sources disagree. Sticker Mule says to remove and reposition the magnet regularly, ideally weekly. Magnum suggests weekly cleaning for car magnets, or daily in extreme weather, and the same guide also tells owners of vehicle-mounted signs to clean and reapply them daily. Build-A-Sign only says to remove them periodically. The safe reading is: more often is better, and always after rain or snow, which Magnum names specifically.

1. Lift, do not slide. Take the magnet off by lifting it from the sides rather than the corners. Sliding it across the paint can stretch or scratch it (Vistaprint).
2. Clean both surfaces. Wash the back of the magnet and the panel with a mild detergent and a soft cloth, as Magnum and Vistaprint describe.
3. Dry both completely. Moisture trapped under the sheet is one of the causes of trouble, so let both surfaces dry before the magnet goes back on.
4. Put it back flat. Build-A-Sign suggests placing one corner first and letting the pull set the rest, with no air pockets. If it is crooked, lift it off and start again.
5. Take it off before a car wash. Vistaprint says to remove the magnet before washing the vehicle.
6. Store it flat. Keep it on a flat surface, clean and dry, without magnetic sides touching and with nothing heavy on top (Build-A-Sign). Sticker Mule says flat storage prevents warping.

Two more points matter in an Ontario winter and summer. Cold makes the material stiff: Vistaprint warns that a magnet can become brittle in extreme cold, Build-A-Sign says it may not grip properly, and Magnum says to apply it at room temperature, above 16°C (60°F). Heat and sun matter too. Both Magnum and Vistaprint note that long-term use can cause the paint under the magnet to fade differently from the paint around it, which is another reason to move it now and then.

Our catalogue lists a 2–3 year exterior life for our car magnets, with the care above.

Wrap films: cast and calendered

If you go the vinyl route, the first technical choice is the film. Vehicle films come in two families, named after how they are made.

• Calendered film starts as a semi-solid that is rolled out to its final width and thickness, as GRAPHICS PRO explains. Avery Dennison describes it as a production process that gives a film usually used for flat or simple curves (Avery Dennison: self-adhesive vinyl).
• Cast film starts as something closer to a liquid, poured and cast into its final thickness. Avery Dennison describes it as giving a more conformable film, used for curved surfaces.

The way it is made shows up on the vehicle. GRAPHICS PRO describes calendered film as having a “memory”: it tends to pull back towards its original size and shape. Cast film has no such memory, so it stays the shape it was applied in and is more stable over time. On Avery Dennison’s Asia Pacific site, the company sums it up the same way: cast films give better conformability and durability for complex surfaces and vehicle wraps, while calendered films are mostly used on flatter surfaces and for short to medium term graphics.

Film makers’ own product listings follow that split. 3M lists its IJ180mC wrap film as a cast vinyl for vehicle wraps and fleet graphics, with application surfaces that include compound curves, corrugations and flat panels with rivets. Its Controltac 40C range is described as polymeric calendered film for flat and simple curved surfaces.

On how long each lasts, check the film’s own data sheet rather than a rule of thumb, because ratings vary by product, colour and laminate. GRAPHICS PRO’s author puts calendered spot graphics on vertical sides at under two years and says cast films last longer outdoors, especially in strong heat and sun, and usually carry multi-year manufacturer warranties. The laminate matters too: for riveted or corrugated surfaces, Avery Dennison recommends its cast laminate with its cast base films (Avery Dennison TB 5.9).

Our vehicle wraps listing offers two films. The premium film handles complex curves and rivets and removes cleanly later, and is also offered for small pieces. The value film suits flatter, smooth panels at a lower cost. If your vehicle has deep curves, recesses or rivets, ask for the premium film on your quote.

Spot graphics, partial wrap or full wrap

Coverage is the second choice. There are three common levels.

• Spot graphics are individual pieces: a logo on each door, a phone number on the back. They are the closest vinyl equivalent to a magnet, but they stay on and they work on aluminum.
• A partial wrap covers part of the body, such as the sides and rear, and uses the vehicle’s own paint as part of the design.
• A full wrap covers the whole painted body, including the bumpers, hood and roof.

GRAPHICS PRO recommends cast film for full wraps, especially on bumpers and on horizontal surfaces such as hoods, roofs and trunks, and for partial wraps that run over complex contours or deep recesses. Calendered film can work for spot graphics that are short-term and sit on vertical sides. So the more of the body you cover, and the more curves it crosses, the stronger the case for cast film.

Paint condition matters for a wrap

A wrap is only as good as the paint under it. Avery Dennison’s application bulletin for its cast films (TB 5.9) says wax and polish residues must be removed completely, and that paint must be fully dry, hardened and free of scratches. Air-dried and repair paints need at least one week to dry out before film goes on, because solvents left in the paint can hurt adhesion and cause shrinkage or blistering.

Removal is where old repairs show up. The same bulletin warns that paint layers which do not adhere properly to each other may lift when the film is taken off later. 3M lists IJ180mC as removable with heat, and its car wrap care FAQ advises taking graphics off straight away if they start to discolour or turn brown, so they do not stain the paint underneath. If your vehicle has had body work, a respray or rust repair, mention it and photograph it when you ask for a quote.

Caring for a wrap

Film makers are specific about washing a wrap, and they do not always agree, so follow the instructions for your own film.

• Wait before the first wash. Avery Dennison says not to wash its films for the first 48 hours (IB 1.8). 3M says to wait a week, and longer in very cold weather (3M car wrap FAQ).
• Hand washing is preferred. Both makers say so. Avery asks for a vehicle wash product that is non-abrasive, wax-free and roughly pH neutral, and says not to use household dish soap.
• Avoid brush car washes. Avery does not recommend them because the brushes catch the edges of graphics; 3M says touchless washes are best and brush washes can dull, scratch and lift edges.
• Clean off bugs, bird droppings, tree sap and tar quickly. Avery calls for immediate spot cleaning because these can stain and damage the film; 3M suggests soaking them in hot soapy water first, never scrubbing.
• Skip the wax. 3M strongly recommends not using wax or similar coatings on vehicle graphics, and both makers rule out abrasive polishes.
• Park in the shade when you can. Both makers say sun and pollutants degrade vinyl over time.

Pressure washers are allowed by both makers, within limits that differ. The common thread: keep the nozzle a fair distance away, aim it straight at the film, and never spray at an angle into an edge, because that can force water under the film and lift it.

Designing for a vehicle on the move

Whatever goes on the vehicle, people see it briefly, often from another moving vehicle. The best research we found on reading signs from the road comes from the United States Sign Council Foundation’s guideline standards for on-premise signs. They were written for fixed signs read by passing drivers, not for signs that are themselves moving, so treat the numbers below as a starting point rather than a rule.

• Few words. The USSC cites research that four to eight words in simple type can be read and understood in about four seconds, roughly half a second per word. A recognisable logo counts as about one word.
• Letter height. USSC uses a legibility index: feet of viewing distance per inch of capital letter height. It suggests an average of about 30 ft per inch on a test track, but real driving cuts this by at least 35% on average, and in busy city traffic it suggests planning for about 20 ft per inch.
• Upper and lower case. Text set in all capitals needs about 15% more letter height to be read from the same distance as upper and lower case.
• Open space. USSC sets a minimum where the lettering and graphics take up no more than about 40% of the panel, leaving at least 60% as open space around them.

Applied to a 12 × 24 in magnet: at 20 ft per inch, capital letters 3 in tall would read from about 60 ft away in city traffic. That is enough for a business name and a phone number, and not much more. A full wrap gives you far larger panels, but the same rule holds: one message, big, with space around it. Our viewing distance tool works out letter heights for your own distance, using a more cautious rule of thumb.

For the artwork itself, our catalogue asks for car magnet files at 150 DPI at full size (12 × 24 in for the standard magnet), in CMYK, with text kept 0.75 in away from the edges. File setup for other products is in our artwork guide.

Where everything goes on the vehicle

Before choosing sizes, decide what each part of the vehicle is for. The sides carry the main message to traffic and to people on the sidewalk. The back is read by the driver behind you, often while stopped. And some of the glass has to stay clear by law.

Windows and the rules in Ontario

Graphics on glass are where the law comes in. Ontario’s Highway Traffic Act has three sections that matter for vehicle signs. We read the current text on 27 October 2026; this is a plain-language summary, not legal advice, and it covers Ontario only.

• No signs that block the driver’s view (s. 73(1)). You may not drive with a sign, poster or other non-transparent material on the windshield or any window in a way that obstructs the driver’s view of the road or an intersecting road.
• No colour coating that blocks the view (s. 73(2)). The same applies to a colour spray or colour coating on the windshield or any window.
• No coloured or reflective material on the windshield or the windows beside the driver that substantially obscures the interior from outside (s. 73(3)). This covers the windshield and the windows directly to the left and right of the driver’s seat.
• A clear view out (s. 74(1)). The windshield and the windows on either side of the driver must give a clear view to the front and side, and the rear window a clear view to the rear.
• The rear window exception (s. 74(2)). The rear window rule does not apply if the vehicle has mirrors, securely attached, that give the driver a clearly reflected view of the road behind other than through the rear window. Separately, s. 66(1) requires most motor vehicles to have such a mirror anyway.

In practice: keep the windshield and the front side windows free of graphics, and only cover a rear window if the vehicle has mirrors that give the driver a clear view behind. Section 73(4) adds that these rules do not stop signs or markings that the Act or its regulations require. The Act does not name specific window films, so ask about the material for any glass graphic before you order. Municipal sign by-laws and the rules in other provinces are separate, and this guide does not cover them.

What to measure and photograph before you order

Gather these before you ask for a quote.

For a car magnet

1. Do the fridge magnet test across the whole area where the sign will go.
2. Measure the flat area of the door: the width and height you can cover without crossing the handle, trim, a body line or the edge of the door.
3. Compare it with the sizes: 12 × 24, 10 × 20 or 18 × 24 in, or ask for a custom size that fits.
4. Take one straight-on photo of each door, so the layout can be checked against the real panel.

For a wrap or vinyl graphics

1. Note the make, model and year, which our vehicle wraps listing asks for, along with your logo.
2. Photograph each side straight on, plus the front and the back, standing far enough away to get the whole vehicle in each shot.
3. Add close-ups of anything unusual: rivets, deep recesses, ribbed panels, existing decals, scratches, rust and any repainted or repaired areas.
4. Say what you want covered: spot graphics, a partial wrap or a full wrap, and whether any glass is involved.
5. Tell us how long it needs to last, since that helps choose between the premium and value films.

Which one should you choose?

• Choose a car magnet if the panel is steel and flat, you want the sign off for personal driving or for moving between vehicles, and you are happy to remove and clean it regularly.
• Choose spot graphics or a partial wrap if the panel is aluminum or plastic, the door is curved or ribbed, or you want something that stays on without daily handling.
• Choose a full wrap if you want the whole vehicle to carry the brand, and plan on cast film for the curves, bumpers, hood and roof.

Send your photos, the vehicle details and your logo through our quote form or contact page. Production time depends on the product — your quote gives you a firm date before you approve anything. Nothing prints until you approve the proof.