High-Strength Customizable Magnetic Zipper Closures for Bag & Sleeve | Custom Sizes Available

Magnetic Zipper Closure (Flexible Magnetic Closure Strip)

Magnetic Zipper Closure (Flexible Magnetic Closure Strip)

Material: NdFeB (Neodymium)
Size: 3mm Width x 6/10mm Thickness ，Customized length available
Grade: N35 / N45/ N52
Coating: Nickel-plated
Features: Waterproof, shock-resistant, bendable, and cuttable. The magnet’s heat-shrink tube coating offers protection while maintaining strong magnetic pull. Easy-to-use, click-close feature.

Applications: Ideal for bag closures, purse closures, sleeve closures, and more. This strong magnetic closure creates a crisp, satisfying “click” sound, ensuring secure, seamless fastening for pouches, bags, and sleeves.

How does it work, see our youtube video here!

• One-hand close
• No snagging
• Cleaner look
• Custom length

Why Choose This  Magnetic Zipper Closure?

• Superior Magnetic Strength: Crafted from high-quality NdFeB material, this magnet offers exceptional magnetic strength, ensuring a secure closure for various applications.
• Versatile Design: This magnet closure is encased in a heat-shrink tube, offering durability, waterproofing, and shock-resistance. It can be bent and cut to fit specific needs.
• Simple Use: Unlike traditional magnetic snaps, this magnetic closure allows the two sides to snap together effortlessly, providing a solution similar to a zipper but with a quicker, more efficient closing mechanism.
• Customizable Options: Richarms provides customizable sizes, grades, and tube lengths for the magnetic closures to meet your unique product specifications.

Packaging:
Magnet in heat-shrink tube coating

Small unit magnets available in round (radial magnetization) and square (thickness magnetization) shapes, offering customizable magnetic properties.

Magnetic Zipper Closure: NdFeB magnets encased in heat-shrink tubing for enhanced protection and easy handling, offering flexibility for customized closures.

Magnetic Zipper Closure encased in heat-shrink tubing, offering durability, waterproofing, and flexibility for a variety of applications.

Richarms supplies high strength hidden magnet for bag and purse pouches closures. These hidden magnet packed in long tube can be used as pocket closures. Our hidden magnet come in different strength and range in many sizes in both round and rectangular shapes.

Compared with a set of traditional magnetic snap, this magnetic closure packed in tube design offer a full seal solution as zipper does. It’s better than a zipper for it’s smart to close by attracted to the other side when the user just easy make the pouches both side closer, and the customer can be free from getting stuck.

In the above picture, magnet material is N45, size is 3mm diameter and  10mm length, diameter magnetized. Magnet size, grade and the tube length can be made as per your order.

The heat-shrink tube can be transparent, natural color, black, or even customized to match your specific design needs. This added customization provides enhanced aesthetic options and allows for tailored branding and functional protection.

Various heat-shrink tube options for Bar NdFeB magnets, including transparent, natural, black, and customizable colors for tailored design.

Structure Options: 3 Magnetic Zipper Closure Layouts (Choose by “Strength vs. Flexibility”)

Our magnetic zipper closure strip can be built with three internal layouts. All options use a protective outer tube (EVA/TPU/Plastic tube), while the inside core determines closing strength, flex feel, and how “forgiving” it is on curved openings.

Option A — Alternating (1 Magnet + 1 Silicone Spacer)

Magnetic zipper closure cross-section with two magnets then silicone spacer (MM–S repeat) inside a flexible tube.

Best for: softer feel, smoother bending, curved openings
Layout: M | S | M | S | M | S ...
Why buyers choose it:

• More flexible, easier to follow curves
• Softer hand-feel due to silicone spacing
• Great balance for pockets / apparel openings / sleeve edges

Typical core examples:

• Magnet: 3×6mm N35 or 3×10mm N52
• Spacer: 3×10mm silicone
• Standard OD: ~3.5mm; length 100mm / 160mm / custom

Option B — Full-Magnet (Continuous Magnets)

Magnetic Zipper Closure Structure B (Full-Magnet Core)

Best for: maximum holding force, straight openings, premium “snap-close”
Layout: M | M | M | M | M ...
Why buyers choose it:

• Strongest attraction along the entire length
• Feels most like a “magnetic zipper” when closing
• Ideal for bag openings, structured cases, and clean-edge closures

Typical core examples:

• Magnet: 3×6mm N35 or 3×10mm N52
• Standard OD: ~3.5mm; length 100mm / 160mm / custom

Option C — Grouped (2 Magnets + 1 Silicone Spacer)

Magnetic Zipper Closure Structure C (M–S Alternating Core)

Best for: strong closing + extra flexibility (balanced “power & comfort”)
Layout: M | M | S | M | M | S ...
Why buyers choose it:

• Strong “closing points” from paired magnets
• Silicone gaps give better flexibility than full-magnet design
• Great for fashion goods where both hold + comfort matter

Typical core examples:

• Magnet: 3×6mm N35
• Spacer: 3×20mm silicone
• Standard OD: ~3.5mm; length 100mm / 160mm / custom

Quick Selection Guide

• Need maximum strength? → Option B (Full-Magnet)
• Need best flexibility/soft feel? → Option A (Alternating)
• Need a balanced “strong + flexible”? → Option C (Grouped)

How to Specify for a Quote (Copy & Send)

Please send us:

1. Application (bag opening / laptop sleeve / pocket / apparel)
2. Length (e.g., 160mm or custom)
3. Core option (A/B/C)
4. Magnet size & grade (e.g., 3×10mm N52)
5. Outer tube (TPU/EVA/Plastic tube) + color
6. Bonding method (heat press / heat weld / heat lamination)

Magnetic Zipper Closure FAQ:

• Can it be cut? Yes, anywhere.
• Washable? Yes, with tube, waterproof.
• Minimum order? No
• Sample lead time? 7-10 days