Description
Permabond® UV639 is a crystal-clear UV-curing adhesive engineered for bonding acrylic (PMMA, Perspex®, Plexiglass®), PETG, and other difficult-to-bond plastics. It also provides strong adhesion to glass and metals, making it an excellent choice for applications demanding both strength and aesthetics.
UV639 cures in seconds under UV light, eliminating the need for screws or mechanical fasteners. This results in a seamless, non-yellowing, invisible bond ideal for visible joints and easy-to-clean surfacesUV639_TDS.
Key Features & Benefits
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Fast UV Cure – cures in seconds with UV exposure.
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Crystal-Clear Finish – non-yellowing, invisible bond.
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Excellent Adhesion – bonds acrylic, PETG, polycarbonate, glass, and metals.
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High Strength & Flexibility – resists cracking, with >220% elongation.
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No Mechanical Fasteners Required – reduces weak points and improves design flexibility.
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Thermal & Moisture Resistant – withstands harsh environments.
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Easy to Clean – smooth bond lines simplify disinfection and maintenance.
Common Applications
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Acrylic screen bonding in supermarkets, offices, banks, and retail
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Point of sale display construction
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Shop fittings and furniture assembly
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Architectural and decorative designs
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Transparent plastic-to-metal or plastic-to-glass bonding
Technical Specifications
| Property | Value |
|---|---|
| Chemical Base | Urethane methacrylate |
| Appearance | Colorless, crystal clear |
| Viscosity @ 25°C | 1,200–1,800 mPa·s |
| Cure Wavelength | 365–420 nm |
| Fixture Time (PMMA) | 5s (4mW/cm² lamp), <1s (200mW/cm² LED) |
| Fixture Time (Polycarbonate) | 10s (4mW/cm² lamp) |
| Overlap Shear Strength | >8 N/mm² (PC), >6 N/mm² (Acrylic), >7 N/mm² (PETG) |
| Tensile Strength | 20 N/mm² (ISO37) |
| Elongation at Break | >220% |
| Hardness | 35–45 Shore D |
| Glass Transition (Tg) | 70°C (158°F) |
| Temperature Range | -55°C to 150°C (short exposure) |
| Water Absorption (ISO62) | 14% (2 hrs in boiling water) |
Compliance & Handling
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Not recommended for use with strong oxidizers.
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Handle using standard industrial hygiene practices.
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Store at 5–25°C (41–77°F), protected from ambient lightUV639_TDS.
Compatible Substrates
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Acrylic (PMMA, Perspex®, Plexiglass®)
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PETG and PET
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Polycarbonate
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Glass
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Metals (with proper surface preparation)
Packaging & Ordering
Permabond UV639 is available in:
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50ml bottles (10 per pack)
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250ml bottles (10 per pack)
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Bulk packaging on request
For volume orders or technical assistance, contact Chemical Concepts for tailored support.
Why Buy from Chemical Concepts?
As an authorized distributor of Permabond adhesives, we offer expert technical support, fast shipping, and tailored solutions for your bonding applications.
Call us at 800-220-1966 or Request a Quote today.
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