DIYMAG Blank Car Magnets 4-Pack 24 x 12 in — Printable 40 mil Magnetic Vehicle Signs, Rounded Corners

DIYMAG blank car magnets are large, printable 24 x 12-inch magnetic signs sold in a 4-piece set for easy vehicle branding, logo coverage, or temporary advertising.

These flexible magnetic sheets are designed for quick on-and-off use on ferrous vehicle panels and other steel surfaces. Each magnet is 24 x 12 inches and 40 mil thick, with rounded corners and reinforced magnetic backing to stay put during normal driving conditions. The white printable vinyl face accepts inkjet, solvent, eco-solvent, latex inks, or permanent markers so you can add your own graphics, contact details, or plain color covers without hassle.

How durable are these magnets on the road?

The reinforced magnetic backing and 40 mil thickness give these signs reliable hold on steel car surfaces at typical driving speeds. Rounded corners reduce curl, and the flexible design helps maintain contact across slightly curved panels. While built for outdoor use, longevity depends on storage and care—remove periodically to avoid moisture trapping.

• 40 mil magnetic thickness for improved grip
• Rounded corners to minimize peeling at edges
• Designed for steel/ferrous surfaces only (not aluminum or plastic)
• Remove and clean surface regularly to prevent paint issues

Can I personalize these for business promotions or logo coverage?

Yes — the white vinyl face is printable and accepts a wide range of inks and permanent markings so you can add logos, contact info, or full-bleed artwork. They also work well as temporary logo covers when you need to conceal a company emblem or protect areas during transport. Cutting the sheets into custom shapes is possible for smaller decals or specialized placements.

• Inkjet and solvent/eco-solvent/latex compatible
• Printable full-surface for custom graphics
• Can be trimmed to desired shapes and sizes
• Useful for temporary branding or logo concealment

How easy is it to apply and remove the magnets without damaging paint?

These magnets are designed to be reusable and non-damaging when used correctly: apply to a clean, dry, smooth ferrous surface and press flat to maximize contact. Removal is simple—lift one corner and peel away—then wipe the area and the magnet to prevent grime build-up. Avoid leaving magnets in place for extended periods in wet or high-heat conditions to reduce the risk of paint issues.

• Apply flat to clean steel surfaces for secure adhesion
• Peel off gently; do not drag to prevent scratches
• Store flat when not in use to preserve magnet shape
• Periodic removal and cleaning recommended to protect paint

Will these magnets work on every vehicle panel?

They will adhere firmly to ferrous (steel) panels but will not stick to aluminum, plastic, fiberglass, or alloy surfaces. Check the placement surface before purchase—most vehicle doors and hoods on older or many mainstream cars are steel, while some modern models use aluminum or composite materials. Use a small magnet to test the panel if you are unsure.

• Compatible with steel/ferrous surfaces only
• Not suitable for aluminum, plastic, or fiberglass panels
• Test questionable areas with a small magnet first
• Ideal for doors, trunk lids, and other steel body panels

Who is this for: DIYMAG 24 x 12-inch blank car magnets suit small-business owners, delivery drivers, tradespeople, marketers running temporary campaigns, and anyone who needs quick, removable vehicle signage or logo concealment. They’re especially useful for people who want an inexpensive, customizable way to promote a service or protect and hide existing emblems, without committing to permanent decals.