Why Won't My Magnet Stick? 8 Common Causes and Fixes
Most of the time the surface isn’t magnetic steel, the steel is too thin, or something creates a gap. Many stainless steel appliance fronts, aluminum and brass don’t attract magnets. Thin sheet steel, paint and texture cut holding power, and loads that slide down a wall need about 5× more pull than loads that pull straight off. If two magnets won’t meet, they’re facing the same pole: flip one.
Work Through These Checks
- Is the Surface Magnetic?Touch a magnet to it. No pull at all means it isn't iron or steel. Aluminum, copper, brass, most stainless steel and many decorative panels aren't magnetic.
- Is the Steel Thick Enough?Thin sheet steel saturates and holds roughly half what thick steel does. Add a Steel Plate or use more magnets.
- Is There a Gap?Paint, powder coat, texture, wallpaper, labels, tape or a plastic cover all count as an air gap. Touch the magnet to bare metal to compare.
- Does the Load Slide?On a vertical surface a magnet holds only 15 to 25% of its rating. Plan on 10× the weight in total pull force, or use our magnet calculator.
- Are the Poles Facing Correctly?Two magnets repel if like poles face each other. Flip one, or use a Pole Detector.
- Is the Adhesive the Problem?If the magnet comes off with its glue or tape, the bond failed, not the magnet. See adhesives for magnets.
- Was It Overheated?Above 80 °C (176 °F), standard magnets lose strength for good: grills, engine bays, a dashboard in summer sun.
- Is It Chipped or Rusted?Damaged magnets lose material and strength. See will neodymium magnets rust?
The Stainless Steel Fridge Problem
Many stainless steel fridge doors use austenitic stainless (300 series), which is barely magnetic; others use a magnetic grade. The sides of the same fridge are often painted carbon steel, which is. Try a magnet on the side panels, or stick a thin steel disc to the door with adhesive. Read neodymium magnets and stainless steel.
Quick Fixes
| Cause | Fix |
|---|---|
| Not magnetic steel | Add a Steel Disc or Strike Plate with adhesive |
| Thin steel | Use more or larger magnets, or a Pot Magnet |
| Gap from paint or a cover | Use a thicker magnet, which reaches farther |
| Sliding load | Add pull force (10× the weight), or a Rubber Coated Magnet for grip |
| Magnets repel | Flip one; mark poles with a Pole Detector |
| Adhesive failed | Clean both surfaces and use an adhesive that bonds nickel, such as Starbond EM-2000 |
Think Your Magnet Is Defective?
Compare it with another magnet from the same pack on the same surface. Neodymium magnets don’t weaken in storage, so a big difference usually points to heat or damage. If something’s wrong with your order, contact us: returns are accepted within 30 days.