5 Metal disc plates with 3M ™ magnetic double sided tape for mobile phone

Metal plates with 3M 300LSE adhesive for magnetic holders – 30 mm, 40 mm and 60 mm disc set

These adhesive metal plates are designed for magnetic holders in cars, on desks or walls. The rear side has 3M 300LSE adhesive (beige liner with green 3M print), intended for smooth, non-porous surfaces. The three available sizes (30 mm, 40 mm and 60 mm) provide a suitable contact area for the device or case.

Why choose them

• Compatible with magnetic holders: each plate acts as the ferromagnetic interface between the holder magnet and the device.
• Strong adhesion (as stated for the adhesive): 3M 300LSE is designed for smooth and difficult-to-bond materials, including many rigid plastics and painted metals.
• Three diameters: 30/40/60 mm for a bare phone, a thin case or a robust case/wider surface.
• Thin profile: adds little thickness and can be hidden under many cases.
• Versatile: suitable for smartphones, light tablets, sat-navs, badges, magnetic labelling and office organisation.

Product details

• Formats: Ø 30 mm, Ø 40 mm and Ø 60 mm (see selectable variant).
• Construction: round metal plate with 3M 300LSE adhesive liner on the back.
• Colour: metal front; beige liner with green 3M print on the back.
• Typical use: rigid cases, smooth plastic, painted metal, glass and clean, degreased flat surfaces.

Application instructions

1. Clean: degrease the surface with isopropyl alcohol or a non-oily cleaner and dry it.
2. Position: test the position before application; avoid curved or raised areas.
3. Apply: remove the 3M liner, place the plate and press firmly for 20–30 seconds with even pressure.
4. Set: wait at least 24 hours before loading it with the magnet.

Use and compatibility

• Recommended cases are rigid polycarbonate/ABS/PU with a smooth surface. Avoid soft silicone, very elastic TPU, rubberised surfaces, fabric, rough leather or textured cases.
• On wireless-charging devices, position the plate outside the coil area or use a case that separates it from the charger; otherwise charging may not work.
• To remove it, lift one edge slowly with dental floss or cord; remove adhesive residue with isopropyl alcohol after testing on a hidden area.

Important warnings

• Adhesion depends on cleaning, application pressure, setting time and the surface. Avoid dirty, dusty, oily or curved surfaces.
• It is not a magnet: the plate is ferromagnetic and works with a holder containing a magnet (not included).
• Prolonged contact with moisture, solvents or high temperatures may reduce adhesion.

Contents and variants

• Variants are supplied according to the product sheet; check the selected pack and diameter (30, 40 or 60 mm) in the options.

These are general indications. Test on a hidden area before use on delicate surfaces.