Magnetic signs are one of the easiest ways to advertise your business—but proper care is essential to keep them looking great and protecting your vehicle.
This guide covers everything you need to know about applying, cleaning, and storing magnetic car signs the right way.
Proper magnetic sign care not only extends the life of your signs but also helps prevent paint damage and ensures safe use at highway speeds.
Thinking about buying magnetic signs? Proper care is what keeps them looking professional and prevents issues like paint damage or lifting at highway speeds.
Not sure if magnetic signs will work on your vehicle? Learn which vehicles are compatible with magnetic signs.
Quick Tips:
- Remove and clean your magnets regularly
- Always apply to a clean, flat surface
- Dry completely before reapplying
- Never store magnets inside your vehicle
How to Apply Magnetic Signs Correctly
Getting a strong, secure hold starts with proper application.
- Make sure both the vehicle surface and magnet are clean and dry
- Apply one edge first, then slowly lay the magnet flat
- Press out any air pockets as you go
- Only apply to flat, smooth steel surfaces, not curves, trim, rust spots, or body lines
Pro tip: If temperatures are cold, make sure the magnet itself is above 50°F before applying.
How to Clean Magnetic Car Signs (Prevent Paint Damage)
Regular cleaning is the most important step to protect both your magnet and your vehicle. Knowing how to clean magnetic car signs properly is the key to preventing damage and extending their lifespan.
- Remove the magnet from your vehicle
- Wipe both the magnet and vehicle surface
- Wash the magnetic side with mild soap and warm water
- Dry completely before reapplying
If you leave magnets on too long without cleaning, dirt and moisture can get trapped—and that’s what causes paint issues.
How Often Should You Remove & Clean Magnets?
- Daily if you drive frequently or on dusty or gravel roads
- Every 2–3 days under normal conditions
- Immediately after rain or snow
- More often during hot, humid weather
This simple habit prevents moisture buildup and keeps your magnets performing like new.
Magnetic Sign Care Quick Reference
| Task | Recommended Frequency |
|---|---|
| Cleaning | Every 1–3 days |
| Inspection | After rain or snow |
| Full removal | Regularly, daily if heavily used |
| Storage | Flat, indoors at room temperature |
Do Magnetic Signs Damage Car Paint?
Magnetic signs do not damage paint when used properly.
However, problems can occur if:
- Dirt or moisture gets trapped underneath
- The magnet is left on too long without cleaning
- The surface is uneven, dirty, or recently painted
- The sign is applied over rust, dents, trim, or body seams
To prevent damage:
- Remove and clean regularly
- Always apply to a clean, flat surface
- Avoid placing magnets over rust, dents, trim, or body seams
- Dry both surfaces completely before putting the magnet back on
How to Store Magnetic Signs
Proper storage helps maintain shape and strength.
- Store flat whenever possible
- Keep indoors at room temperature
- For larger magnets, you can roll them around a 3" diameter core with the printed side facing outward
- Do not place heavy objects on top
- Never store magnets inside your vehicle
What Not to Do With Magnetic Signs
- Do not leave magnets on for weeks without removing them
- Do not apply magnets over dirt, moisture, or wax buildup
- Do not place magnets across seams, curves, trim, or body lines
- Do not store magnets folded or bent
- Do not ignore air pockets when applying
Common Mistakes to Avoid
- Leaving magnets on for extended periods without cleaning
- Applying magnets to uneven or non-metal surfaces
- Reapplying magnets before they are fully dry
- Using harsh chemicals to clean magnetic signs
- Storing magnets loosely in the back of a hot vehicle
Magnetic Sign Care Summary
To properly care for magnetic car signs, apply them to a clean, flat surface, remove and clean them regularly, and store them flat indoors when not in use. This prevents paint damage and helps ensure long-term performance.
Magnetic vehicle signs are designed for safe, long-term use when properly maintained and applied to clean, flat metal surfaces.
All of our magnetic signs are manufactured in the USA using high-quality materials designed for long-term outdoor use.
Frequently Asked Questions
Do magnetic signs stick to all vehicles?
No. Magnetic signs only stick to steel body panels. They will not adhere to aluminum, fiberglass, plastic, or other non-magnetic surfaces.
Can you leave magnetic signs on your car all the time?
No. Magnets should be removed and cleaned regularly to prevent moisture and debris from causing damage.
Will magnetic signs stay on at highway speeds?
Yes—when properly applied to a clean, flat metal surface with no air pockets, magnetic signs are designed to stay secure at normal driving speeds.
Do magnetic signs damage car paint?
Magnetic signs do not damage paint when used properly. Issues can occur if dirt or moisture is trapped underneath or if magnets are left on too long without cleaning.
How often should I remove and clean my magnets?
Clean daily if you drive frequently or in dusty, humid, rainy, or snowy conditions. Otherwise, every few days is recommended.
How should magnetic signs be stored?
Store magnetic signs flat indoors at room temperature. Larger signs can also be stored around a 3-inch diameter roll with the printed side facing outward.
How long do magnetic signs last?
With proper care and regular cleaning, magnetic signs can last for years without fading or losing strength.
Can I apply magnets in cold weather?
Yes, but the magnet itself should be above 50°F before applying to ensure proper flexibility and adhesion.
Ready to Order Your Magnetic Signs?
Shop custom magnetic signs designed for durability, easy application, and professional results.
Final Reminder: Keep magnets clean, keep them flat, and check them often. A few seconds of maintenance goes a long way in protecting your vehicle and keeping your advertising looking professional.
*Accent Signs and Graphics, Inc. is not responsible for misuse of magnetic materials, including issues related to improper cleaning, application, or storage.
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