The Xiaomi Mi Band is one of the most vulnerable parts of the fitness bracelet. Over time, silicone loses elasticity, cracks appear, and the mount to the body loosens or breaks off. It costs 30 to 50 percent of the cost of a new bracelet, so many users prefer to repair the old one. But not every glue is suitable for this: silicone and plastic require special formulations, and the wrong choice can spoil the device or cause allergies.
In this article, we will discuss 5 proven ways to bond the strap (including emergency solutions and professional methods), how to prepare the surface for maximum adhesion, and give tips for extending the service life after repair. You will also learn what mistakes are most often made when gluing and how to avoid them.
Why Xiaomi Mi Band Band breaks down: the main reasons
Before you start repairing, it's important to understand why the strap mounting failed, which will help you choose the right glue and bonding method.
- 🔹 Natural wear of silicone: over time, the material loses elasticity, becomes brittle and cracks, especially in the folding areas.
- 🔹 Mechanical loads: sudden jerks (for example, when the bracelet clings to clothes), falls or squeezing can break the mount at the base.
- 🔹 Exposure to aggressive environments: sweat, hand creams, alcohol solutions or household chemicals destroy the structure of silicone and adhesive layer.
- 🔹 Poor build: in some parts of the Mi Band 5/6 Users complained about the weak factory fastening of the strap to the body.
If the strap is broken off at the base (at the mounting point to the body), the problem is usually the breakdown of the adhesive layer between the plastic insert and the silicone. If a crack appears on the strap itself, the bonding may be a temporary measure, it is better to consider replacing it.
What glue is suitable for the Xiaomi Mi Band strap: a comparison of 7 options
Not all adhesives are equally effective for silicone and plastic, and we tested 7 popular compounds and evaluated them according to criteria: bonding strength, seam elasticity, water resistance and skin safety.
| Type of glue | Strength | Elasticity | Water resistance | Safety for the skin | Approximate price |
|---|---|---|---|---|---|
| Cyanoacrylate (superglue) | ⭐⭐⭐⭐⭐ | ⭐⭐ | ⭐⭐⭐ | ⭐ (may cause irritation) | 50–150 ₽ |
| Silicone sealant | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐ (hypoallergenic) | 200–400 ₽ |
| Epoxy resin | ⭐⭐⭐⭐⭐ | ⭐ | ⭐⭐⭐⭐ | ⭐⭐ (coating) | 300–600 ₽ |
| Polyurethane glue | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | 250–500 ₽ |
| Shoe glue (for example, "Moment Shoes") | ⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐ | 100–200 ₽ |
The best choice for long-term repairs is silicone sealant or polyurethane glue. They provide an elastic seam that will not crumble when you bending the strap. Cyanacrylate (superglue) is suitable for emergency repairs, but the seam will be tough and can crack when you're under load. Epoxy resin only be used if you're willing to sacrifice the flexibility of the strap for maximum strength.
⚠️ Warning: Do not use solvent-based glue (e.g., "Moment Crystal") - it destroys silicone! Also avoid heat glue: when heated, it melts, and when cooled, it becomes brittle.
Step-by-step: how to glue the Xiaomi Mi Band strap
Before bonding, you need to carefully prepare the surfaces, and neglecting this stage is the main reason why the strap falls off again after a few days.
Carefully remove the remnants of old glue with a knife or tweezers |
Treat the surfaces with alcohol or acetone for degreasing |
Clean the gluing site with fine sandpaper (granularity 1000-1500)|
Dry the parts with a hair dryer (without overheating!) or leave for 10 minutes at room temperature-->
When the surfaces are ready, start gluing:
- Applying glue: For silicone sealant: squeeze a thin layer onto the plastic body insert, spread evenly with your finger (in gloves!). For cyanoacrylate: apply 1-2 drops on both surfaces without smearing. For epoxy, mix the components and apply a brush.
Combination of details:
Fixing:
Removal of surplus:
💡
If you glue the Mi Band 7/8 strap with a metal body, pre-glaze the place around with paint tape - this will protect against getting glue on the touch buttons.
What to do if the strap cracked in the middle: 3 ways to repair
If the crack is not at the base, but on the strap itself, bonding is possible, but less reliable. Here are three methods in order of effectiveness:
- Silicone patch: Cut a small piece of silicone from an old strap or a purchase patch (sold in shoe repair stores). Apply a thin layer of silicone glue to the crack, apply a patch on the inside of the strap, and lock for 24 hours, which restores up to 80% of the strength.
- String reinforcement: Drain a thin nylon thread (like a fishing line or fishing vein) through the holes along the edges of the crack, tighten and tie the knot. Top, seal with silicone sealant. Suitable for longitudinal cracks up to 1.5 cm long.
- Shrink tube: Put a fitting diameter heat shrink tube on the strap at the fracture site (sold in electronics stores) and warm up with a hairdryer. The method is suitable for cross-cutting, but makes the strap less flexible.
Before using, conduct an allergy test!