Hotbond P.U. Adhesive is a professional-grade polyurethane solution designed for the high-strength bonding of synthetic soles, leather, PVC, and rubber. Formulated for the footwear industry, it utilizes a heat-reactivation process to create a bond that is exceptionally resistant to water, oil, and heat.
The Heat-Activated PU Cement for Footwear and Leather Manufacturing.
Hotbond P.U. Adhesive is a professional-grade polyurethane solution designed for the high-strength bonding of synthetic soles, leather, PVC, and rubber. Formulated for the footwear industry, it utilizes a heat-reactivation process to create a bond that is exceptionally resistant to water, oil, and heat.
It is the standard choice for “sole attaching”—bonding shoe soles to uppers. The adhesive dries to a clear, non-tacky film that allows for precise alignment of parts. Once activated with heat (80°C – 90°C), it creates an immediate, permanent chemical weld that creates a flexible and durable joint capable of withstanding the constant flexing of walking.
Key Features:
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Heat Activated: Allows for precise positioning before the bond is triggered.
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Water Resistant: Ideal for outdoor footwear and rain boots.
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Clear Finish: Non-staining formula leaves no visible glue lines.
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High Flexibility: Bonds resist cracking even under constant flexing.
| Base | Polyurethane (PU) Solution |
| Appearance | Clear / Transparent Liquid |
| Drying Time | 20 – 30 Minutes (Before heating) |
| Activation Temp | 80°C – 90°C (Surface Temperature) |
| Open Time | Immediate bond after heating |
| Viscosity | Brushable Liquid |
| Cleaner | Kenlac Standard Thinner / Acetone |
1. Surface Preparation
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Leather: Scuff/Roughen the surface with sandpaper to open the fibers.
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Rubber/PVC: Wipe clean with solvent to remove mold release agents or grease.
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Surfaces must be dry and dust-free.
2. Application
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Apply a uniform coat of Hotbond to both surfaces using a stiff brush.
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Drying: Allow the adhesive to dry at room temperature for 20 to 30 minutes. The glue should look dry and not feel sticky to the touch.
3. Heat Activation (The Critical Step)
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Using a heat gun, infrared lamp, or oven, heat the adhesive films on both surfaces to 80°C – 90°C.
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The adhesive will suddenly turn glossy/tacky when it reaches the right temperature.
4. Assembly
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While the adhesive is still hot (immediately after heating), press the two parts together accurately.
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Apply heavy pressure for 10–15 seconds. In shoe manufacturing, a sole press is used. For manual work, use a hammer or heavy clamp.
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Note: Maximum bond strength is achieved after 24 hours.
No 3D model available for this product.
