Description
Permabond UV670 is a crystal-clear, single-part UV-curable adhesive specifically engineered for high-stress glass bonding applications. Unlike rigid UV glues that can cause glass to crack under thermal expansion, UV670 features a unique flexible formulation that absorbs stress, making it the premier choice for bonding glass to metal, glass to plastic, and glass to glass.
Its optical clarity and refractive index are matched closely to glass, creating “invisible” structural joints for display cases, glass furniture, and art installations. It cures on demand upon exposure to UV light, allowing for infinite open time to perfectly align complex glass assemblies before locking them in place.
It is a medium viscosity, moderatly flowing UV glue
Features & Benefits
- Cure on demand
- Flexible, good impact resistance
- Fast curing with low-power lamps
- 100% solids, no solvents
- Excellent adhesion to glass and metals
Physical Properties of Uncured Adhesive
| Chemical Composition | Methacrylate ester |
| Viscosity @ 25C |
20rpm: 2000-3000 mPa.s (cP) |
| Specific Gravity | 1.1 |
Performance Characteristics
|
UV Curing Wavelength |
365 – 400 nm |
|
UV Curing Time (by strength of light) |
Low power 4mW/cm battery lamp: 7 secs |
|
Tensile Strength |
12 N/mm (1700 psi) |
|
Shear Strength |
6-10 N/mm (870 psi 1450 psi) Glass to Steel: 900psi to 1000psi 6 to 7 N/mm) |
|
Temperature Resistance |
212f (100C) 60% strength 302f (150C) 18% strength |
|
Appearance |
High Clarity, Colorless, Optically Clear, Transparent |
|
Elongation (ISO37) |
>80% |
|
Hardness (ISO868) |
50 to 60 Shore D |
*The cure time depends on the power of the UV lamp, its spectral output, the distance between the lamp and the components, and the transmission characteristics of the substrates.**LED UV lamps have a narrow range of spectral output. It is important to check suitability with Permabond in order to match the LED lamps peak wavelength with that of the adhesives photoinitiator to ensure optimal adhesive cure.
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